7890905984 has 32 divisors (see below), whose sum is σ = 16929411240. Its totient is φ = 3641955840.

The previous prime is 7890905983. The next prime is 7890905989. The reversal of 7890905984 is 4895090987.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890905983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2369402 + ... + 2372729.

Almost surely, 2^7890905984 is an apocalyptic number.

It is an amenable number.

7890905984 is an abundant number, since it is smaller than the sum of its proper divisors (9038505256).

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

7890905984 is a wasteful number, since it uses less digits than its factorization.

7890905984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742158 (or 4742146 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 7890905984 is about 88830.7716053396. The cubic root of 7890905984 is about 1990.8671913826.

The spelling of 7890905984 in words is "seven billion, eight hundred ninety million, nine hundred five thousand, nine hundred eighty-four".