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3970872 = 2332131421
BaseRepresentation
bin1111001001011100111000
321110202000100
433021130320
52004031442
6221035400
745515613
oct17113470
97422010
103970872
112272414
1213b5b60
13a90539
1475517a
1553684c
hex3c9738

3970872 has 48 divisors (see below), whose sum is σ = 10862280. Its totient is φ = 1310400.

The previous prime is 3970859. The next prime is 3970903. The reversal of 3970872 is 2780793.

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

It is an Ulam number.

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, 9222 + ... + 9642.

Almost surely, 23970872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3970872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5431140).

3970872 is an abundant number, since it is smaller than the sum of its proper divisors (6891408).

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

3970872 is a wasteful number, since it uses less digits than its factorization.

3970872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 3970872 is about 1992.7046946299. The cubic root of 3970872 is about 158.3538509576.

The spelling of 3970872 in words is "three million, nine hundred seventy thousand, eight hundred seventy-two".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 131 262 393 421 524 786 842 1048 1179 1263 1572 1684 2358 2526 3144 3368 3789 4716 5052 7578 9432 10104 15156 30312 55151 110302 165453 220604 330906 441208 496359 661812 992718 1323624 1985436 3970872