72356224 has 16 divisors (see below), whose sum is σ = 144147420. Its totient is φ = 36178048.

The previous prime is 72356203. The next prime is 72356227. The reversal of 72356224 is 42265327.

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72356227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282514 + ... + 282769.

Almost surely, 2^72356224 is an apocalyptic number.

It is an amenable number.

72356224 is a deficient number, since it is larger than the sum of its proper divisors (71791196).

72356224 is an equidigital number, since it uses as much as digits as its factorization.

72356224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565297 (or 565285 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 72356224 is about 8506.2461756053. The cubic root of 72356224 is about 416.7017249079.

The spelling of 72356224 in words is "seventy-two million, three hundred fifty-six thousand, two hundred twenty-four".