7900920 has 96 divisors (see below), whose sum is σ = 27209520. Its totient is φ = 1981440.

The previous prime is 7900909. The next prime is 7900931. The reversal of 7900920 is 290097.

It is an interprime number because it is at equal distance from previous prime (7900909) and next prime (7900931).

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 23 ways as a sum of consecutive naturals, for example, 5475 + ... + 6765.

Almost surely, 2^7900920 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 7900920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13604760).

7900920 is an abundant number, since it is smaller than the sum of its proper divisors (19308600).

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

7900920 is a wasteful number, since it uses less digits than its factorization.

7900920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 7900920 is about 2810.8575204019. The cubic root of 7900920 is about 199.1709010574.

Multiplying 7900920 by its sum of digits (27), we get a triangular number (213324840 = T₂₀₆₅₅).

The spelling of 7900920 in words is "seven million, nine hundred thousand, nine hundred twenty".