72204644 has 24 divisors (see below), whose sum is σ = 134120448. Its totient is φ = 33895040.

The previous prime is 72204641. The next prime is 72204647. The reversal of 72204644 is 44640227.

It is an interprime number because it is at equal distance from previous prime (72204641) and next prime (72204647).

It is not an unprimeable number, because it can be changed into a prime (72204641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33149 + ... + 35259.

It is an arithmetic number, because the mean of its divisors is an integer number (5588352).

Almost surely, 2^72204644 is an apocalyptic number.

It is an amenable number.

72204644 is a deficient number, since it is larger than the sum of its proper divisors (61915804).

72204644 is a wasteful number, since it uses less digits than its factorization.

72204644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635 (or 2633 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 72204644 is about 8497.3315811495. The cubic root of 72204644 is about 416.4105368441.

The spelling of 72204644 in words is "seventy-two million, two hundred four thousand, six hundred forty-four".