72484418 has 4 divisors (see below), whose sum is σ = 108726630. Its totient is φ = 36242208.

The previous prime is 72484403. The next prime is 72484429. The reversal of 72484418 is 81448427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81448427 = 41 ⋅1986547.

It can be written as a sum of positive squares in only one way, i.e., 67453369 + 5031049 = 8213^2 + 2243^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18121103 + ... + 18121106.

Almost surely, 2^72484418 is an apocalyptic number.

72484418 is a deficient number, since it is larger than the sum of its proper divisors (36242212).

72484418 is a wasteful number, since it uses less digits than its factorization.

72484418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36242211.

The product of its digits is 57344, while the sum is 38.

The square root of 72484418 is about 8513.7781272476. The cubic root of 72484418 is about 416.9476707832.

The spelling of 72484418 in words is "seventy-two million, four hundred eighty-four thousand, four hundred eighteen".