7929859990 has 16 divisors (see below), whose sum is σ = 15371728848. Its totient is φ = 2927948256.

The previous prime is 7929859939. The next prime is 7929860009. The reversal of 7929859990 is 999589297.

It is a super-2 number, since 2×7929859990² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30499332 + ... + 30499591.

It is an arithmetic number, because the mean of its divisors is an integer number (960733053).

Almost surely, 2^7929859990 is an apocalyptic number.

7929859990 is a deficient number, since it is larger than the sum of its proper divisors (7441868858).

7929859990 is a wasteful number, since it uses less digits than its factorization.

7929859990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60998943.

The product of its (nonzero) digits is 33067440, while the sum is 67.

The square root of 7929859990 is about 89049.7613135487. The cubic root of 7929859990 is about 1994.1378334562.

The spelling of 7929859990 in words is "seven billion, nine hundred twenty-nine million, eight hundred fifty-nine thousand, nine hundred ninety".