7911920 has 20 divisors (see below), whose sum is σ = 18395400. Its totient is φ = 3164736.

The previous prime is 7911907. The next prime is 7911971. The reversal of 7911920 is 291197.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49370 + ... + 49529.

It is an arithmetic number, because the mean of its divisors is an integer number (919770).

Almost surely, 2^7911920 is an apocalyptic number.

It is an amenable number.

7911920 is an abundant number, since it is smaller than the sum of its proper divisors (10483480).

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

7911920 is a wasteful number, since it uses less digits than its factorization.

7911920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98912 (or 98906 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 7911920 is about 2812.8135380789. The cubic root of 7911920 is about 199.2632896211.

The spelling of 7911920 in words is "seven million, nine hundred eleven thousand, nine hundred twenty".