72470730 has 16 divisors (see below), whose sum is σ = 173929824. Its totient is φ = 19325520.

The previous prime is 72470719. The next prime is 72470747. The reversal of 72470730 is 3707427.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2415691 = 72470730 / (7 + 2 + 4 + 7 + 0 + 7 + 3 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207816 + ... + 1207875.

It is an arithmetic number, because the mean of its divisors is an integer number (10870614).

Almost surely, 2^72470730 is an apocalyptic number.

72470730 is an abundant number, since it is smaller than the sum of its proper divisors (101459094).

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

72470730 is a wasteful number, since it uses less digits than its factorization.

72470730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415701.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 72470730 is about 8512.9742158660. The cubic root of 72470730 is about 416.9214235834.

The spelling of 72470730 in words is "seventy-two million, four hundred seventy thousand, seven hundred thirty".