72450338 has 12 divisors (see below), whose sum is σ = 109717650. Its totient is φ = 35881056.

The previous prime is 72450337. The next prime is 72450353. The reversal of 72450338 is 83305427.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 60637369 + 11812969 = 7787^2 + 3437^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72450331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22238 + ... + 25286.

Almost surely, 2^72450338 is an apocalyptic number.

72450338 is a deficient number, since it is larger than the sum of its proper divisors (37267312).

72450338 is a wasteful number, since it uses less digits than its factorization.

72450338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269 (or 3160 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 72450338 is about 8511.7764303346. The cubic root of 72450338 is about 416.8823151083.

The spelling of 72450338 in words is "seventy-two million, four hundred fifty thousand, three hundred thirty-eight".