72864452 has 6 divisors (see below), whose sum is σ = 127512798. Its totient is φ = 36432224.

The previous prime is 72864401. The next prime is 72864461. The reversal of 72864452 is 25446827.

It can be written as a sum of positive squares in only one way, i.e., 72863296 + 1156 = 8536^2 + 34^2 .

It is an unprimeable number.

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, 9108053 + ... + 9108060.

It is an arithmetic number, because the mean of its divisors is an integer number (21252133).

Almost surely, 2^72864452 is an apocalyptic number.

It is an amenable number.

72864452 is a deficient number, since it is larger than the sum of its proper divisors (54648346).

72864452 is a wasteful number, since it uses less digits than its factorization.

72864452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18216117 (or 18216115 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 72864452 is about 8536.0677129460. The cubic root of 72864452 is about 417.6750830801.

The spelling of 72864452 in words is "seventy-two million, eight hundred sixty-four thousand, four hundred fifty-two".