72790436 has 6 divisors (see below), whose sum is σ = 127383270. Its totient is φ = 36395216.

The previous prime is 72790427. The next prime is 72790477. The reversal of 72790436 is 63409727.

It can be written as a sum of positive squares in only one way, i.e., 68790436 + 4000000 = 8294^2 + 2000^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72790436.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098801 + ... + 9098808.

It is an arithmetic number, because the mean of its divisors is an integer number (21230545).

Almost surely, 2^72790436 is an apocalyptic number.

It is an amenable number.

72790436 is a deficient number, since it is larger than the sum of its proper divisors (54592834).

72790436 is a wasteful number, since it uses less digits than its factorization.

72790436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18197613 (or 18197611 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 72790436 is about 8531.7311256274. The cubic root of 72790436 is about 417.5336098297.

The spelling of 72790436 in words is "seventy-two million, seven hundred ninety thousand, four hundred thirty-six".