7929988 has 24 divisors (see below), whose sum is σ = 15551424. Its totient is φ = 3506400.

The previous prime is 7929983. The next prime is 7929997. The reversal of 7929988 is 8899297.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7929983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808 + ... + 4063.

It is an arithmetic number, because the mean of its divisors is an integer number (647976).

Almost surely, 2^7929988 is an apocalyptic number.

It is an amenable number.

7929988 is a deficient number, since it is larger than the sum of its proper divisors (7621436).

7929988 is a wasteful number, since it uses less digits than its factorization.

7929988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923 (or 4921 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 7929988 is about 2816.0234374025. The cubic root of 7929988 is about 199.4148563709.

The spelling of 7929988 in words is "seven million, nine hundred twenty-nine thousand, nine hundred eighty-eight".