86657320 has 32 divisors (see below), whose sum is σ = 196189920. Its totient is φ = 34447680.

The previous prime is 86657317. The next prime is 86657321. The reversal of 86657320 is 2375668.

It is a super-2 number, since 2×86657320² = 15018982219164800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 86657320.

It is not an unprimeable number, because it can be changed into a prime (86657321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (6130935).

Almost surely, 2^86657320 is an apocalyptic number.

It is an amenable number.

86657320 is an abundant number, since it is smaller than the sum of its proper divisors (109532600).

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

86657320 is a wasteful number, since it uses less digits than its factorization.

86657320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13465 (or 13461 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 86657320 is about 9308.9913524506. The cubic root of 86657320 is about 442.5222221702.

The spelling of 86657320 in words is "eighty-six million, six hundred fifty-seven thousand, three hundred twenty".