72423418 has 8 divisors (see below), whose sum is σ = 108676512. Its totient is φ = 36197916.

The previous prime is 72423397. The next prime is 72423419. The reversal of 72423418 is 81432427.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72423418.

It is not an unprimeable number, because it can be changed into a prime (72423419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921 + ... + 12187.

It is an arithmetic number, because the mean of its divisors is an integer number (13584564).

Almost surely, 2^72423418 is an apocalyptic number.

72423418 is a deficient number, since it is larger than the sum of its proper divisors (36253094).

72423418 is a wasteful number, since it uses less digits than its factorization.

72423418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13796.

The product of its digits is 10752, while the sum is 31.

The square root of 72423418 is about 8510.1949448882. The cubic root of 72423418 is about 416.8306757717.

Subtracting 72423418 from its reverse (81432427), we obtain a palindrome (9009009).

It can be divided in two parts, 724 and 23418, that added together give a palindrome (24142).

The spelling of 72423418 in words is "seventy-two million, four hundred twenty-three thousand, four hundred eighteen".