72189162 has 12 divisors (see below), whose sum is σ = 156409890. Its totient is φ = 24063048.

The previous prime is 72189121. The next prime is 72189193. The reversal of 72189162 is 26198127.

It can be written as a sum of positive squares in only one way, i.e., 41486481 + 30702681 = 6441^2 + 5541^2 .

It is a super-2 number, since 2×72189162² = 10422550220524488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2005237 + ... + 2005272.

Almost surely, 2^72189162 is an apocalyptic number.

72189162 is an abundant number, since it is smaller than the sum of its proper divisors (84220728).

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

72189162 is a wasteful number, since it uses less digits than its factorization.

72189162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010517 (or 4010514 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 72189162 is about 8496.4205404394. The cubic root of 72189162 is about 416.3807726978.

The spelling of 72189162 in words is "seventy-two million, one hundred eighty-nine thousand, one hundred sixty-two".