72420484 has 6 divisors (see below), whose sum is σ = 126735854. Its totient is φ = 36210240.

The previous prime is 72420479. The next prime is 72420487. The reversal of 72420484 is 48402427.

It can be written as a sum of positive squares in only one way, i.e., 58522500 + 13897984 = 7650^2 + 3728^2 .

It is not an unprimeable number, because it can be changed into a prime (72420487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052557 + ... + 9052564.

Almost surely, 2^72420484 is an apocalyptic number.

It is an amenable number.

72420484 is a deficient number, since it is larger than the sum of its proper divisors (54315370).

72420484 is a wasteful number, since it uses less digits than its factorization.

72420484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105125 (or 18105123 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 72420484 is about 8510.0225616622. The cubic root of 72420484 is about 416.8250468479.

The spelling of 72420484 in words is "seventy-two million, four hundred twenty thousand, four hundred eighty-four".