72668032 has 16 divisors (see below), whose sum is σ = 144768600. Its totient is φ = 36333952.

The previous prime is 72668021. The next prime is 72668039. The reversal of 72668032 is 23086627.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72668039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283732 + ... + 283987.

Almost surely, 2^72668032 is an apocalyptic number.

It is an amenable number.

72668032 is a deficient number, since it is larger than the sum of its proper divisors (72100568).

72668032 is an equidigital number, since it uses as much as digits as its factorization.

72668032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567733 (or 567721 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 72668032 is about 8524.5546511240. The cubic root of 72668032 is about 417.2994377731.

The spelling of 72668032 in words is "seventy-two million, six hundred sixty-eight thousand, thirty-two".