72115432 has 16 divisors (see below), whose sum is σ = 136481760. Its totient is φ = 35720304.

The previous prime is 72115423. The next prime is 72115441. The reversal of 72115432 is 23451127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72115423) and next prime (72115441).

It is a junction number, because it is equal to n+sod(n) for n = 72115397 and 72115406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41268 + ... + 42979.

It is an arithmetic number, because the mean of its divisors is an integer number (8530110).

Almost surely, 2^72115432 is an apocalyptic number.

It is an amenable number.

72115432 is a deficient number, since it is larger than the sum of its proper divisors (64366328).

72115432 is a wasteful number, since it uses less digits than its factorization.

72115432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84360 (or 84356 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 72115432 is about 8492.0805460146. The cubic root of 72115432 is about 416.2389683459.

Adding to 72115432 its reverse (23451127), we get a palindrome (95566559).

The spelling of 72115432 in words is "seventy-two million, one hundred fifteen thousand, four hundred thirty-two".