72438764 has 6 divisors (see below), whose sum is σ = 126767844. Its totient is φ = 36219380.

The previous prime is 72438761. The next prime is 72438787. The reversal of 72438764 is 46783427.

It is not an unprimeable number, because it can be changed into a prime (72438761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9054842 + ... + 9054849.

It is an arithmetic number, because the mean of its divisors is an integer number (21127974).

Almost surely, 2^72438764 is an apocalyptic number.

It is an amenable number.

72438764 is a deficient number, since it is larger than the sum of its proper divisors (54329080).

72438764 is a wasteful number, since it uses less digits than its factorization.

72438764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18109695 (or 18109693 counting only the distinct ones).

The product of its digits is 225792, while the sum is 41.

The square root of 72438764 is about 8511.0965216005. The cubic root of 72438764 is about 416.8601148306.

The spelling of 72438764 in words is "seventy-two million, four hundred thirty-eight thousand, seven hundred sixty-four".