72707444 has 6 divisors (see below), whose sum is σ = 127238034. Its totient is φ = 36353720.

The previous prime is 72707443. The next prime is 72707447. The reversal of 72707444 is 44470727.

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 15523600 = 7562^2 + 3940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72707443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9088427 + ... + 9088434.

It is an arithmetic number, because the mean of its divisors is an integer number (21206339).

Almost surely, 2^72707444 is an apocalyptic number.

It is an amenable number.

72707444 is a deficient number, since it is larger than the sum of its proper divisors (54530590).

72707444 is a wasteful number, since it uses less digits than its factorization.

72707444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18176865 (or 18176863 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 72707444 is about 8526.8660127857. The cubic root of 72707444 is about 417.3748658652.

The spelling of 72707444 in words is "seventy-two million, seven hundred seven thousand, four hundred forty-four".