72558423 has 40 divisors (see below), whose sum is σ = 125642528. Its totient is φ = 40870656.

The previous prime is 72558403. The next prime is 72558427. The reversal of 72558423 is 32485527.

72558423 is a `hidden beast` number, since 72 + 5 + 584 + 2 + 3 = 666.

It is not a de Polignac number, because 72558423 - 2⁵ = 72558391 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72558427) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40515 + ... + 42267.

Almost surely, 2^72558423 is an apocalyptic number.

72558423 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

72558423 is a deficient number, since it is larger than the sum of its proper divisors (53084105).

72558423 is a wasteful number, since it uses less digits than its factorization.

72558423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1836 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 72558423 is about 8518.1232087826. The cubic root of 72558423 is about 417.0895206594.

The spelling of 72558423 in words is "seventy-two million, five hundred fifty-eight thousand, four hundred twenty-three".