73639138 has 8 divisors (see below), whose sum is σ = 116956332. Its totient is φ = 34653696.

The previous prime is 73639127. The next prime is 73639171. The reversal of 73639138 is 83193637.

It can be written as a sum of positive squares in 2 ways, for example, as 68608089 + 5031049 = 8283^2 + 2243^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 73639138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082895 + ... + 1082962.

Almost surely, 2^73639138 is an apocalyptic number.

73639138 is a deficient number, since it is larger than the sum of its proper divisors (43317194).

73639138 is a wasteful number, since it uses less digits than its factorization.

73639138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165876.

The product of its digits is 81648, while the sum is 40.

The square root of 73639138 is about 8581.3249559727. The cubic root of 73639138 is about 419.1500915723.

The spelling of 73639138 in words is "seventy-three million, six hundred thirty-nine thousand, one hundred thirty-eight".