72318542 has 8 divisors (see below), whose sum is σ = 110316600. Its totient is φ = 35546344.

The previous prime is 72318529. The next prime is 72318559. The reversal of 72318542 is 24581327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72318499 and 72318508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306317 + ... + 306552.

It is an arithmetic number, because the mean of its divisors is an integer number (13789575).

Almost surely, 2^72318542 is an apocalyptic number.

72318542 is a deficient number, since it is larger than the sum of its proper divisors (37998058).

72318542 is a wasteful number, since it uses less digits than its factorization.

72318542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612930.

The product of its digits is 13440, while the sum is 32.

The square root of 72318542 is about 8504.0309265665. The cubic root of 72318542 is about 416.6293750803.

Adding to 72318542 its reverse (24581327), we get a palindrome (96899869).

The spelling of 72318542 in words is "seventy-two million, three hundred eighteen thousand, five hundred forty-two".