7820920 has 32 divisors (see below), whose sum is σ = 18364320. Its totient is φ = 2992000.

The previous prime is 7820887. The next prime is 7820927. The reversal of 7820920 is 290287.

It is a super-2 number, since 2×7820920² = 122333579292800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3331 + ... + 5170.

It is an arithmetic number, because the mean of its divisors is an integer number (573885).

Almost surely, 2^7820920 is an apocalyptic number.

It is an amenable number.

7820920 is an abundant number, since it is smaller than the sum of its proper divisors (10543400).

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

7820920 is a wasteful number, since it uses less digits than its factorization.

7820920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535 (or 8531 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7820920 is about 2796.5907816483. The cubic root of 7820920 is about 198.4963907919.

The spelling of 7820920 in words is "seven million, eight hundred twenty thousand, nine hundred twenty".