72520244 has 12 divisors (see below), whose sum is σ = 128649444. Its totient is φ = 35763264.

The previous prime is 72520243. The next prime is 72520247. The reversal of 72520244 is 44202527.

It can be written as a sum of positive squares in 2 ways, for example, as 22676644 + 49843600 = 4762^2 + 7060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72520243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123887 + ... + 124470.

It is an arithmetic number, because the mean of its divisors is an integer number (10720787).

Almost surely, 2^72520244 is an apocalyptic number.

It is an amenable number.

72520244 is a deficient number, since it is larger than the sum of its proper divisors (56129200).

72520244 is a wasteful number, since it uses less digits than its factorization.

72520244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248434 (or 248432 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 72520244 is about 8515.8818686029. The cubic root of 72520244 is about 417.0163527029.

The spelling of 72520244 in words is "seventy-two million, five hundred twenty thousand, two hundred forty-four".