86764720 has 40 divisors (see below), whose sum is σ = 230547744. Its totient is φ = 29747712.

The previous prime is 86764681. The next prime is 86764721. The reversal of 86764720 is 2746768.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (86764721) 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, 76909 + ... + 78028.

Almost surely, 2^86764720 is an apocalyptic number.

86764720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86764720 is an abundant number, since it is smaller than the sum of its proper divisors (143783024).

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

86764720 is a wasteful number, since it uses less digits than its factorization.

86764720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154957 (or 154951 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 86764720 is about 9314.7581825832. The cubic root of 86764720 is about 442.7049621310.

The spelling of 86764720 in words is "eighty-six million, seven hundred sixty-four thousand, seven hundred twenty".