72749900 has 18 divisors (see below), whose sum is σ = 157867500. Its totient is φ = 29099920.

The previous prime is 72749869. The next prime is 72749921. The reversal of 72749900 is 994727.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363650 + ... + 363849.

Almost surely, 2^72749900 is an apocalyptic number.

It is an amenable number.

72749900 is an abundant number, since it is smaller than the sum of its proper divisors (85117600).

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

72749900 is a wasteful number, since it uses less digits than its factorization.

72749900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727513 (or 727506 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72749900 is about 8529.3551925102. The cubic root of 72749900 is about 417.4560891822.

The spelling of 72749900 in words is "seventy-two million, seven hundred forty-nine thousand, nine hundred".