72634918 has 4 divisors (see below), whose sum is σ = 108952380. Its totient is φ = 36317458.

The previous prime is 72634873. The next prime is 72634949. The reversal of 72634918 is 81943627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81943627 = 1399 ⋅58573.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18158728 + ... + 18158731.

It is an arithmetic number, because the mean of its divisors is an integer number (27238095).

Almost surely, 2^72634918 is an apocalyptic number.

72634918 is a deficient number, since it is larger than the sum of its proper divisors (36317462).

72634918 is a wasteful number, since it uses less digits than its factorization.

72634918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36317461.

The product of its digits is 72576, while the sum is 40.

The square root of 72634918 is about 8522.6121582529. The cubic root of 72634918 is about 417.2360419317.

The spelling of 72634918 in words is "seventy-two million, six hundred thirty-four thousand, nine hundred eighteen".