72432789 has 32 divisors (see below), whose sum is σ = 114576000. Its totient is φ = 40124160.

The previous prime is 72432757. The next prime is 72432797. The reversal of 72432789 is 98723427.

It is not a de Polignac number, because 72432789 - 2⁵ = 72432757 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72432789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72432289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45987 + ... + 47535.

It is an arithmetic number, because the mean of its divisors is an integer number (3580500).

Almost surely, 2^72432789 is an apocalyptic number.

It is an amenable number.

72432789 is a deficient number, since it is larger than the sum of its proper divisors (42143211).

72432789 is a wasteful number, since it uses less digits than its factorization.

72432789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685.

The product of its digits is 169344, while the sum is 42.

The square root of 72432789 is about 8510.7455020110. The cubic root of 72432789 is about 416.8486531604.

The spelling of 72432789 in words is "seventy-two million, four hundred thirty-two thousand, seven hundred eighty-nine".