870858864 has 300 divisors, whose sum is σ = 2822792544. Its totient is φ = 258177024.

The previous prime is 870858853. The next prime is 870858871. The reversal of 870858864 is 468858078.

It is a super-2 number, since 2×870858864² = 1516790322014740992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 870858864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 18528889 + ... + 18528935.

Almost surely, 2^870858864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870858864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411396272).

870858864 is an abundant number, since it is smaller than the sum of its proper divisors (1951933680).

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

870858864 is a wasteful number, since it uses less digits than its factorization.

870858864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The square root of 870858864 is about 29510.3179244142. The cubic root of 870858864 is about 954.9543079114.

The spelling of 870858864 in words is "eight hundred seventy million, eight hundred fifty-eight thousand, eight hundred sixty-four".