72900784 has 20 divisors (see below), whose sum is σ = 154086120. Its totient is φ = 33136640.

The previous prime is 72900769. The next prime is 72900791. The reversal of 72900784 is 48700927.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206929 + ... + 207280.

It is an arithmetic number, because the mean of its divisors is an integer number (7704306).

Almost surely, 2^72900784 is an apocalyptic number.

It is an amenable number.

72900784 is an abundant number, since it is smaller than the sum of its proper divisors (81185336).

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

72900784 is a wasteful number, since it uses less digits than its factorization.

72900784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414228 (or 414222 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72900784 is about 8538.1955939180. The cubic root of 72900784 is about 417.7444925530.

It can be divided in two parts, 72900 and 784, that multiplied together give a square (57153600 = 7560²).

The spelling of 72900784 in words is "seventy-two million, nine hundred thousand, seven hundred eighty-four".