72412730 has 16 divisors (see below), whose sum is σ = 140369544. Its totient is φ = 26736960.

The previous prime is 72412727. The next prime is 72412751. The reversal of 72412730 is 3721427.

It can be written as a sum of positive squares in 4 ways, for example, as 52171729 + 20241001 = 7223^2 + 4499^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 72412730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278381 + ... + 278640.

Almost surely, 2^72412730 is an apocalyptic number.

72412730 is a deficient number, since it is larger than the sum of its proper divisors (67956814).

72412730 is a wasteful number, since it uses less digits than its factorization.

72412730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557041.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72412730 is about 8509.5669690061. The cubic root of 72412730 is about 416.8101699484.

The spelling of 72412730 in words is "seventy-two million, four hundred twelve thousand, seven hundred thirty".