84579870 has 16 divisors (see below), whose sum is σ = 202991760. Its totient is φ = 22554624.

The previous prime is 84579857. The next prime is 84579877. The reversal of 84579870 is 7897548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84579877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409635 + ... + 1409694.

It is an arithmetic number, because the mean of its divisors is an integer number (12686985).

Almost surely, 2^84579870 is an apocalyptic number.

84579870 is an abundant number, since it is smaller than the sum of its proper divisors (118411890).

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

84579870 is a wasteful number, since it uses less digits than its factorization.

84579870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819339.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 84579870 is about 9196.7314846091. The cubic root of 84579870 is about 438.9573625532.

The spelling of 84579870 in words is "eighty-four million, five hundred seventy-nine thousand, eight hundred seventy".