72574388 has 6 divisors (see below), whose sum is σ = 127005186. Its totient is φ = 36287192.

The previous prime is 72574351. The next prime is 72574417. The reversal of 72574388 is 88347527.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49168144 + 23406244 = 7012^2 + 4838^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 9071795 + ... + 9071802.

It is an arithmetic number, because the mean of its divisors is an integer number (21167531).

Almost surely, 2^72574388 is an apocalyptic number.

It is an amenable number.

72574388 is a deficient number, since it is larger than the sum of its proper divisors (54430798).

72574388 is a wasteful number, since it uses less digits than its factorization.

72574388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18143601 (or 18143599 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 72574388 is about 8519.0602768146. The cubic root of 72574388 is about 417.1201090947.

The spelling of 72574388 in words is "seventy-two million, five hundred seventy-four thousand, three hundred eighty-eight".