72920336 has 10 divisors (see below), whose sum is σ = 141283182. Its totient is φ = 36460160.

The previous prime is 72920333. The next prime is 72920363. The reversal of 72920336 is 63302927.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69822736 + 3097600 = 8356^2 + 1760^2 .

It is not an unprimeable number, because it can be changed into a prime (72920333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2278745 + ... + 2278776.

Almost surely, 2^72920336 is an apocalyptic number.

It is an amenable number.

72920336 is a deficient number, since it is larger than the sum of its proper divisors (68362846).

72920336 is a wasteful number, since it uses less digits than its factorization.

72920336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557529 (or 4557523 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 72920336 is about 8539.3404897568. The cubic root of 72920336 is about 417.7818355909.

The spelling of 72920336 in words is "seventy-two million, nine hundred twenty thousand, three hundred thirty-six".