7940870868 has 96 divisors (see below), whose sum is σ = 22388531200. Its totient is φ = 2139924096.

The previous prime is 7940870851. The next prime is 7940870881. The reversal of 7940870868 is 8680780497.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354621 + ... + 376347.

Almost surely, 2^7940870868 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 7940870868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11194265600).

7940870868 is an abundant number, since it is smaller than the sum of its proper divisors (14447660332).

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

7940870868 is a wasteful number, since it uses less digits than its factorization.

7940870868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21989 (or 21987 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The square root of 7940870868 is about 89111.5641653764. The cubic root of 7940870868 is about 1995.0603824665.

The spelling of 7940870868 in words is "seven billion, nine hundred forty million, eight hundred seventy thousand, eight hundred sixty-eight".