72320764 has 12 divisors (see below), whose sum is σ = 133222600. Its totient is φ = 34257168.

The previous prime is 72320753. The next prime is 72320789. The reversal of 72320764 is 46702327.

It is a happy number.

It is a congruent 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, 475719 + ... + 475870.

Almost surely, 2^72320764 is an apocalyptic number.

It is an amenable number.

72320764 is a deficient number, since it is larger than the sum of its proper divisors (60901836).

72320764 is a wasteful number, since it uses less digits than its factorization.

72320764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951612 (or 951610 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 72320764 is about 8504.1615694906. The cubic root of 72320764 is about 416.6336420403.

The spelling of 72320764 in words is "seventy-two million, three hundred twenty thousand, seven hundred sixty-four".