86717640 has 64 divisors (see below), whose sum is σ = 267197760. Its totient is φ = 22498560.

The previous prime is 86717623. The next prime is 86717647. The reversal of 86717640 is 4671768.

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

It is not an unprimeable number, because it can be changed into a prime (86717647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5326 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (4174965).

Almost surely, 2^86717640 is an apocalyptic number.

It is an amenable number.

86717640 is an abundant number, since it is smaller than the sum of its proper divisors (180480120).

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

86717640 is a wasteful number, since it uses less digits than its factorization.

86717640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19582 (or 19578 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 86717640 is about 9312.2306672462. The cubic root of 86717640 is about 442.6248745847.

The spelling of 86717640 in words is "eighty-six million, seven hundred seventeen thousand, six hundred forty".