72228184 has 16 divisors (see below), whose sum is σ = 154774800. Its totient is φ = 30954912.

The previous prime is 72228161. The next prime is 72228227. The reversal of 72228184 is 48182227.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644839 + ... + 644950.

It is an arithmetic number, because the mean of its divisors is an integer number (9673425).

Almost surely, 2^72228184 is an apocalyptic number.

It is an amenable number.

72228184 is an abundant number, since it is smaller than the sum of its proper divisors (82546616).

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

72228184 is a wasteful number, since it uses less digits than its factorization.

72228184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289802 (or 1289798 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 72228184 is about 8498.7166089946. The cubic root of 72228184 is about 416.4557843445.

The spelling of 72228184 in words is "seventy-two million, two hundred twenty-eight thousand, one hundred eighty-four".