7881920 has 28 divisors (see below), whose sum is σ = 18769584. Its totient is φ = 3152640.

The previous prime is 7881919. The next prime is 7881959. The reversal of 7881920 is 291887.

It is a happy number.

It is an Ulam number.

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, 11996 + ... + 12635.

Almost surely, 2^7881920 is an apocalyptic number.

It is an amenable number.

7881920 is an abundant number, since it is smaller than the sum of its proper divisors (10887664).

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

7881920 is a wasteful number, since it uses less digits than its factorization.

7881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24648 (or 24638 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 7881920 is about 2807.4757345345. The cubic root of 7881920 is about 199.0111186266.

The spelling of 7881920 in words is "seven million, eight hundred eighty-one thousand, nine hundred twenty".