7869425840 has 20 divisors (see below), whose sum is σ = 18296415264. Its totient is φ = 3147770304.

The previous prime is 7869425831. The next prime is 7869425923. The reversal of 7869425840 is 485249687.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49183832 + ... + 49183991.

Almost surely, 2^7869425840 is an apocalyptic number.

It is an amenable number.

7869425840 is an abundant number, since it is smaller than the sum of its proper divisors (10426989424).

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

7869425840 is a wasteful number, since it uses less digits than its factorization.

7869425840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98367836 (or 98367830 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The square root of 7869425840 is about 88709.7843532493. The cubic root of 7869425840 is about 1989.0590772438.

The spelling of 7869425840 in words is "seven billion, eight hundred sixty-nine million, four hundred twenty-five thousand, eight hundred forty".