72072189 has 48 divisors (see below), whose sum is σ = 124883200. Its totient is φ = 40007520.

The previous prime is 72072181. The next prime is 72072193. The reversal of 72072189 is 98127027.

It is not a de Polignac number, because 72072189 - 2³ = 72072181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72072181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113904 + ... + 114534.

Almost surely, 2^72072189 is an apocalyptic number.

It is an amenable number.

72072189 is a deficient number, since it is larger than the sum of its proper divisors (52811011).

72072189 is a wasteful number, since it uses less digits than its factorization.

With its successor (72072190) it forms an eRAP, since the sums of their prime factors are consecutive (695 and 696).

72072189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72072189 is about 8489.5340861557. The cubic root of 72072189 is about 416.1557544387.

The spelling of 72072189 in words is "seventy-two million, seventy-two thousand, one hundred eighty-nine".