86720916 has 24 divisors (see below), whose sum is σ = 202938400. Its totient is φ = 28822752.

The previous prime is 86720903. The next prime is 86720939. The reversal of 86720916 is 61902768.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6166 + ... + 14541.

Almost surely, 2^86720916 is an apocalyptic number.

It is an amenable number.

86720916 is an abundant number, since it is smaller than the sum of its proper divisors (116217484).

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

86720916 is a wasteful number, since it uses less digits than its factorization.

86720916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21063 (or 21061 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 86720916 is about 9312.4065632896. The cubic root of 86720916 is about 442.6304483097.

The spelling of 86720916 in words is "eighty-six million, seven hundred twenty thousand, nine hundred sixteen".