84072980 has 12 divisors (see below), whose sum is σ = 176553300. Its totient is φ = 33629184.

The previous prime is 84072971. The next prime is 84073021. The reversal of 84072980 is 8927048.

It can be written as a sum of positive squares in 2 ways, for example, as 45185284 + 38887696 = 6722^2 + 6236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101805 + ... + 2101844.

It is an arithmetic number, because the mean of its divisors is an integer number (14712775).

Almost surely, 2^84072980 is an apocalyptic number.

It is an amenable number.

84072980 is an abundant number, since it is smaller than the sum of its proper divisors (92480320).

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

84072980 is a wasteful number, since it uses less digits than its factorization.

84072980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203658 (or 4203656 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 84072980 is about 9169.1319109281. The cubic root of 84072980 is about 438.0787095401.

The spelling of 84072980 in words is "eighty-four million, seventy-two thousand, nine hundred eighty".