3891500928 has 256 divisors, whose sum is σ = 13552128000. Its totient is φ = 1075783680.

The previous prime is 3891500927. The next prime is 3891500947. The reversal of 3891500928 is 8290051983.

It is a happy number.

3891500928 is a `hidden beast` number, since 38 + 91 + 500 + 9 + 28 = 666.

It is a super-2 number, since 2×3891500928² = 30287558945249722368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891500927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747358 + ... + 752546.

It is an arithmetic number, because the mean of its divisors is an integer number (52938000).

Almost surely, 2^3891500928 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 3891500928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6776064000).

3891500928 is an abundant number, since it is smaller than the sum of its proper divisors (9660627072).

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

3891500928 is a wasteful number, since it uses less digits than its factorization.

3891500928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250 (or 5232 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 3891500928 is about 62381.8958352501. The cubic root of 3891500928 is about 1572.9166613421.

The spelling of 3891500928 in words is "three billion, eight hundred ninety-one million, five hundred thousand, nine hundred twenty-eight".