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2189020680 = 2333571122393
BaseRepresentation
bin1000001001111001…
…1100111000001000
312122120000202212000
42002132130320020
513440342130210
61001114151000
7105150240330
oct20236347010
95576022760
102189020680
11a23710700
12511122460
1328b689112
1416aa200c0
15cc29dac0
hex8279ce08

2189020680 has 384 divisors, whose sum is σ = 9169977600. Its totient is φ = 454671360.

The previous prime is 2189020649. The next prime is 2189020693. The reversal of 2189020680 is 860209812.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 913564 + ... + 915956.

It is an arithmetic number, because the mean of its divisors is an integer number (23880150).

Almost surely, 22189020680 is an apocalyptic number.

2189020680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189020680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4584988800).

2189020680 is an abundant number, since it is smaller than the sum of its proper divisors (6980956920).

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

2189020680 is a wasteful number, since it uses less digits than its factorization.

2189020680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2189020680 is about 46786.9712633763. The cubic root of 2189020680 is about 1298.4242604314.

The spelling of 2189020680 in words is "two billion, one hundred eighty-nine million, twenty thousand, six hundred eighty".