72730744 has 8 divisors (see below), whose sum is σ = 136370160. Its totient is φ = 36365368.

The previous prime is 72730739. The next prime is 72730751. The reversal of 72730744 is 44703727.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×72730744² = 10579522245587072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545664 + ... + 4545679.

It is an arithmetic number, because the mean of its divisors is an integer number (17046270).

Almost surely, 2^72730744 is an apocalyptic number.

It is an amenable number.

72730744 is a deficient number, since it is larger than the sum of its proper divisors (63639416).

72730744 is a wasteful number, since it uses less digits than its factorization.

72730744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091349 (or 9091345 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 72730744 is about 8528.2321731998. The cubic root of 72730744 is about 417.4194454167.

The spelling of 72730744 in words is "seventy-two million, seven hundred thirty thousand, seven hundred forty-four".