3891002904 has 96 divisors (see below), whose sum is σ = 10678515120. Its totient is φ = 1279807488.

The previous prime is 3891002903. The next prime is 3891002909. The reversal of 3891002904 is 4092001983.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891002903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3260932 + ... + 3262124.

Almost surely, 2^3891002904 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 3891002904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5339257560).

3891002904 is an abundant number, since it is smaller than the sum of its proper divisors (6787512216).

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

3891002904 is a wasteful number, since it uses less digits than its factorization.

3891002904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 3891002904 is about 62377.9039724805. The cubic root of 3891002904 is about 1572.8495592409.

The spelling of 3891002904 in words is "three billion, eight hundred ninety-one million, two thousand, nine hundred four".