72420516 has 36 divisors (see below), whose sum is σ = 209215552. Its totient is φ = 20691504.

The previous prime is 72420503. The next prime is 72420547. The reversal of 72420516 is 61502427.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×72420516² = 10489462275412512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72420516.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143440 + ... + 143943.

Almost surely, 2^72420516 is an apocalyptic number.

It is an amenable number.

72420516 is an abundant number, since it is smaller than the sum of its proper divisors (136795036).

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

72420516 is a wasteful number, since it uses less digits than its factorization.

72420516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287400 (or 287395 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 72420516 is about 8510.0244417980. The cubic root of 72420516 is about 416.8251082412.

The spelling of 72420516 in words is "seventy-two million, four hundred twenty thousand, five hundred sixteen".