72912404 has 12 divisors (see below), whose sum is σ = 127656564. Its totient is φ = 36439104.

The previous prime is 72912401. The next prime is 72912421. The reversal of 72912404 is 40421927.

It can be written as a sum of positive squares in 2 ways, for example, as 60996100 + 11916304 = 7810^2 + 3452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72912401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13982 + ... + 18474.

It is an arithmetic number, because the mean of its divisors is an integer number (10638047).

Almost surely, 2^72912404 is an apocalyptic number.

It is an amenable number.

72912404 is a deficient number, since it is larger than the sum of its proper divisors (54744160).

72912404 is a wasteful number, since it uses less digits than its factorization.

72912404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554 (or 8552 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72912404 is about 8538.8760384491. The cubic root of 72912404 is about 417.7666867958.

The spelling of 72912404 in words is "seventy-two million, nine hundred twelve thousand, four hundred four".