86397570 has 128 divisors (see below), whose sum is σ = 278899200. Its totient is φ = 18579456.

The previous prime is 86397539. The next prime is 86397581. The reversal of 86397570 is 7579368.

It is a happy number.

86397570 is a `hidden beast` number, since 8 + 639 + 7 + 5 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30786 + ... + 33474.

It is an arithmetic number, because the mean of its divisors is an integer number (2178900).

Almost surely, 2^86397570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86397570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139449600).

86397570 is an abundant number, since it is smaller than the sum of its proper divisors (192501630).

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

86397570 is a wasteful number, since it uses less digits than its factorization.

86397570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 86397570 is about 9295.0293167908. The cubic root of 86397570 is about 442.0796352626.

The spelling of 86397570 in words is "eighty-six million, three hundred ninety-seven thousand, five hundred seventy".