72018580 has 24 divisors (see below), whose sum is σ = 156119040. Its totient is φ = 27877920.

The previous prime is 72018559. The next prime is 72018599. The reversal of 72018580 is 8581027.

72018580 is nontrivially palindromic in base 8.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57460 + ... + 58699.

It is an arithmetic number, because the mean of its divisors is an integer number (6504960).

Almost surely, 2^72018580 is an apocalyptic number.

It is an amenable number.

72018580 is an abundant number, since it is smaller than the sum of its proper divisors (84100460).

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

72018580 is a wasteful number, since it uses less digits than its factorization.

72018580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116199 (or 116197 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 72018580 is about 8486.3761406150. The cubic root of 72018580 is about 416.0525466784.

The spelling of 72018580 in words is "seventy-two million, eighteen thousand, five hundred eighty".