86979570 has 64 divisors (see below), whose sum is σ = 214323840. Its totient is φ = 22583808.

The previous prime is 86979569. The next prime is 86979577. The reversal of 86979570 is 7597968.

It is not an unprimeable number, because it can be changed into a prime (86979577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277734 + ... + 278046.

It is an arithmetic number, because the mean of its divisors is an integer number (3348810).

Almost surely, 2^86979570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86979570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107161920).

86979570 is an abundant number, since it is smaller than the sum of its proper divisors (127344270).

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

86979570 is a wasteful number, since it uses less digits than its factorization.

86979570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 86979570 is about 9326.2838258333. The cubic root of 86979570 is about 443.0700750468.

The spelling of 86979570 in words is "eighty-six million, nine hundred seventy-nine thousand, five hundred seventy".