72704484 has 18 divisors (see below), whose sum is σ = 183780870. Its totient is φ = 24234816.

The previous prime is 72704477. The next prime is 72704491. The reversal of 72704484 is 48440727.

It is an interprime number because it is at equal distance from previous prime (72704477) and next prime (72704491).

It can be written as a sum of positive squares in only one way, i.e., 69355584 + 3348900 = 8328^2 + 1830^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2019569 = 72704484 / (7 + 2 + 7 + 0 + 4 + 4 + 8 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1009749 + ... + 1009820.

Almost surely, 2^72704484 is an apocalyptic number.

It is an amenable number.

72704484 is an abundant number, since it is smaller than the sum of its proper divisors (111076386).

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

72704484 is a wasteful number, since it uses less digits than its factorization.

72704484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019579 (or 2019574 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 72704484 is about 8526.6924419730. The cubic root of 72704484 is about 417.3692018584.

The spelling of 72704484 in words is "seventy-two million, seven hundred four thousand, four hundred eighty-four".