87990404396 has 24 divisors (see below), whose sum is σ = 155482177536. Its totient is φ = 43567242320.

The previous prime is 87990404353. The next prime is 87990404417. The reversal of 87990404396 is 69340409978.

It is a super-2 number, since 2×87990404396² (a number of 23 digits) contains 22 as substring.

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, 1111781 + ... + 1188291.

It is an arithmetic number, because the mean of its divisors is an integer number (6478424064).

Almost surely, 2^87990404396 is an apocalyptic number.

It is an amenable number.

87990404396 is a deficient number, since it is larger than the sum of its proper divisors (67491773140).

87990404396 is a wasteful number, since it uses less digits than its factorization.

87990404396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79309 (or 79307 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 87990404396 in words is "eighty-seven billion, nine hundred ninety million, four hundred four thousand, three hundred ninety-six".