7997900 has 18 divisors (see below), whose sum is σ = 17355660. Its totient is φ = 3199120.

The previous prime is 7997867. The next prime is 7997903. The reversal of 7997900 is 97997.

It is not an unprimeable number, because it can be changed into a prime (7997903) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 39890 + ... + 40089.

Almost surely, 2^7997900 is an apocalyptic number.

It is an amenable number.

7997900 is an abundant number, since it is smaller than the sum of its proper divisors (9357760).

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

7997900 is a wasteful number, since it uses less digits than its factorization.

7997900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79993 (or 79986 counting only the distinct ones).

The product of its (nonzero) digits is 35721, while the sum is 41.

The square root of 7997900 is about 2828.0558693208. The cubic root of 7997900 is about 199.9824984685.

It can be divided in two parts, 79 and 97900, that added together give a palindrome (97979).

The spelling of 7997900 in words is "seven million, nine hundred ninety-seven thousand, nine hundred".