72255789 has 12 divisors (see below), whose sum is σ = 104634972. Its totient is φ = 48048000.

The previous prime is 72255769. The next prime is 72255847. The reversal of 72255789 is 98755227.

It is a happy number.

72255789 is a `hidden beast` number, since 72 + 2 + 5 + 578 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40106889 + 32148900 = 6333^2 + 5670^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72255789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72255739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6402 + ... + 13619.

It is an arithmetic number, because the mean of its divisors is an integer number (8719581).

Almost surely, 2^72255789 is an apocalyptic number.

It is an amenable number.

72255789 is a deficient number, since it is larger than the sum of its proper divisors (32379183).

72255789 is a wasteful number, since it uses less digits than its factorization.

72255789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428 (or 20425 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 72255789 is about 8500.3405225908. The cubic root of 72255789 is about 416.5088328777.

The spelling of 72255789 in words is "seventy-two million, two hundred fifty-five thousand, seven hundred eighty-nine".