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3216139380 = 2232517867441
BaseRepresentation
bin1011111110110010…
…0110010001110100
322022010201210211100
42333230212101310
523041312430010
61251045010100
7142461506436
oct27754462164
98263653740
103216139380
111400477133
127590b3930
133c33cc96c
142271ca656
1513c53a2c0
hexbfb26474

3216139380 has 36 divisors (see below), whose sum is σ = 9755623332. Its totient is φ = 857637120.

The previous prime is 3216139379. The next prime is 3216139391. The reversal of 3216139380 is 839316123.

3216139380 is a `hidden beast` number, since 3 + 2 + 1 + 613 + 9 + 38 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 843670116 + 2372469264 = 29046^2 + 48708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8933541 + ... + 8933900.

It is an arithmetic number, because the mean of its divisors is an integer number (270989537).

Almost surely, 23216139380 is an apocalyptic number.

3216139380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3216139380 is an abundant number, since it is smaller than the sum of its proper divisors (6539483952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3216139380 is a wasteful number, since it uses less digits than its factorization.

3216139380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17867456 (or 17867451 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3216139380 is about 56711.0163901160. The cubic root of 3216139380 is about 1476.0858621036.

The spelling of 3216139380 in words is "three billion, two hundred sixteen million, one hundred thirty-nine thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 180 17867441 35734882 53602323 71469764 89337205 107204646 160806969 178674410 214409292 268011615 321613938 357348820 536023230 643227876 804034845 1072046460 1608069690 3216139380