84724660 has 24 divisors (see below), whose sum is σ = 184058280. Its totient is φ = 32721024.

The previous prime is 84724639. The next prime is 84724693. The reversal of 84724660 is 6642748.

84724660 = T₅₈₁₉ + T₅₈₂₀ + ... + T₅₈₂₃.

It can be written as a sum of positive squares in 4 ways, for example, as 599076 + 84125584 = 774^2 + 9172^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72459 + ... + 73618.

It is an arithmetic number, because the mean of its divisors is an integer number (7669095).

Almost surely, 2^84724660 is an apocalyptic number.

It is an amenable number.

84724660 is an abundant number, since it is smaller than the sum of its proper divisors (99333620).

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

84724660 is a wasteful number, since it uses less digits than its factorization.

84724660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146115 (or 146113 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 84724660 is about 9204.5999369880. The cubic root of 84724660 is about 439.2076995187.

The spelling of 84724660 in words is "eighty-four million, seven hundred twenty-four thousand, six hundred sixty".