7890920 has 16 divisors (see below), whose sum is σ = 17754660. Its totient is φ = 3156352.

The previous prime is 7890919. The next prime is 7890923. The reversal of 7890920 is 290987.

It can be written as a sum of positive squares in 2 ways, for example, as 7409284 + 481636 = 2722^2 + 694^2 .

It is not an unprimeable number, because it can be changed into a prime (7890923) by changing a digit.

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, 98597 + ... + 98676.

Almost surely, 2^7890920 is an apocalyptic number.

It is an amenable number.

7890920 is an abundant number, since it is smaller than the sum of its proper divisors (9863740).

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

7890920 is a wasteful number, since it uses less digits than its factorization.

7890920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197284 (or 197280 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 7890920 is about 2809.0781406006. The cubic root of 7890920 is about 199.0868370123.

The spelling of 7890920 in words is "seven million, eight hundred ninety thousand, nine hundred twenty".