870405672 has 16 divisors (see below), whose sum is σ = 2176014240. Its totient is φ = 290135216.

The previous prime is 870405617. The next prime is 870405673. The reversal of 870405672 is 276504078.

It is a self number, because there is not a number n which added to its sum of digits gives 870405672.

It is not an unprimeable number, because it can be changed into a prime (870405673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18133428 + ... + 18133475.

It is an arithmetic number, because the mean of its divisors is an integer number (136000890).

Almost surely, 2^870405672 is an apocalyptic number.

It is an amenable number.

870405672 is an abundant number, since it is smaller than the sum of its proper divisors (1305608568).

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

870405672 is a wasteful number, since it uses less digits than its factorization.

870405672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36266912 (or 36266908 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 870405672 is about 29502.6383904898. The cubic root of 870405672 is about 954.7886275069.

The spelling of 870405672 in words is "eight hundred seventy million, four hundred five thousand, six hundred seventy-two".