72189204 has 24 divisors (see below), whose sum is σ = 173875968. Its totient is φ = 23286720.

The previous prime is 72189197. The next prime is 72189209. The reversal of 72189204 is 40298127.

It is a happy number.

It is a super-2 number, since 2×72189204² = 10422562348307232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72189209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96657 + ... + 97400.

It is an arithmetic number, because the mean of its divisors is an integer number (7244832).

Almost surely, 2^72189204 is an apocalyptic number.

It is an amenable number.

72189204 is an abundant number, since it is smaller than the sum of its proper divisors (101686764).

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

72189204 is a wasteful number, since it uses less digits than its factorization.

72189204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194095 (or 194093 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 72189204 is about 8496.4230120681. The cubic root of 72189204 is about 416.3808534485.

The spelling of 72189204 in words is "seventy-two million, one hundred eighty-nine thousand, two hundred four".