7903920 has 40 divisors (see below), whose sum is σ = 24502896. Its totient is φ = 2107648.

The previous prime is 7903897. The next prime is 7903937. The reversal of 7903920 is 293097.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16227 + ... + 16706.

Almost surely, 2^7903920 is an apocalyptic number.

It is an amenable number.

7903920 is an abundant number, since it is smaller than the sum of its proper divisors (16598976).

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

7903920 is a wasteful number, since it uses less digits than its factorization.

7903920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32949 (or 32943 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 7903920 is about 2811.3911147331. The cubic root of 7903920 is about 199.1961064383.

The spelling of 7903920 in words is "seven million, nine hundred three thousand, nine hundred twenty".