72418438 has 8 divisors (see below), whose sum is σ = 110157840. Its totient is φ = 35699160.

The previous prime is 72418433. The next prime is 72418439. The reversal of 72418438 is 83481427.

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 = 72418397 and 72418406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72418433) 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, 254853 + ... + 255136.

It is an arithmetic number, because the mean of its divisors is an integer number (13769730).

Almost surely, 2^72418438 is an apocalyptic number.

72418438 is a deficient number, since it is larger than the sum of its proper divisors (37739402).

72418438 is a wasteful number, since it uses less digits than its factorization.

72418438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510062.

The product of its digits is 43008, while the sum is 37.

The square root of 72418438 is about 8509.9023496160. The cubic root of 72418438 is about 416.8211214756.

The spelling of 72418438 in words is "seventy-two million, four hundred eighteen thousand, four hundred thirty-eight".