72533244 has 24 divisors (see below), whose sum is σ = 193422208. Its totient is φ = 20723760.

The previous prime is 72533239. The next prime is 72533249. The reversal of 72533244 is 44233527.

It is an interprime number because it is at equal distance from previous prime (72533239) and next prime (72533249).

It is a super-2 number, since 2×72533244² = 10522142970327072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72533249) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 431662 + ... + 431829.

Almost surely, 2^72533244 is an apocalyptic number.

It is an amenable number.

72533244 is an abundant number, since it is smaller than the sum of its proper divisors (120888964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72533244 is a wasteful number, since it uses less digits than its factorization.

72533244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863505 (or 863503 counting only the distinct ones).

The product of its digits is 20160, while the sum is 30.

The square root of 72533244 is about 8516.6451141280. The cubic root of 72533244 is about 417.0412693716.

The spelling of 72533244 in words is "seventy-two million, five hundred thirty-three thousand, two hundred forty-four".