72304418 has 8 divisors (see below), whose sum is σ = 108526620. Its totient is φ = 36128880.

The previous prime is 72304411. The next prime is 72304439. The reversal of 72304418 is 81440327.

It can be written as a sum of positive squares in 2 ways, for example, as 71859529 + 444889 = 8477^2 + 667^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72304411) 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, 7493 + ... + 14168.

Almost surely, 2^72304418 is an apocalyptic number.

72304418 is a deficient number, since it is larger than the sum of its proper divisors (36222202).

72304418 is a wasteful number, since it uses less digits than its factorization.

72304418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23332.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 72304418 is about 8503.2004562988. The cubic root of 72304418 is about 416.6022503796.

The spelling of 72304418 in words is "seventy-two million, three hundred four thousand, four hundred eighteen".