72282724 has 6 divisors (see below), whose sum is σ = 126494774. Its totient is φ = 36141360.

The previous prime is 72282701. The next prime is 72282733. The reversal of 72282724 is 42728227.

It can be written as a sum of positive squares in only one way, i.e., 52301824 + 19980900 = 7232^2 + 4470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72282724.

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, 9035337 + ... + 9035344.

Almost surely, 2^72282724 is an apocalyptic number.

It is an amenable number.

72282724 is a deficient number, since it is larger than the sum of its proper divisors (54212050).

72282724 is a wasteful number, since it uses less digits than its factorization.

72282724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070685 (or 18070683 counting only the distinct ones).

The product of its digits is 25088, while the sum is 34.

The square root of 72282724 is about 8501.9247232612. The cubic root of 72282724 is about 416.5605808500.

The spelling of 72282724 in words is "seventy-two million, two hundred eighty-two thousand, seven hundred twenty-four".