73439986 has 8 divisors (see below), whose sum is σ = 111711744. Its totient is φ = 36202740.

The previous prime is 73439981. The next prime is 73439999. The reversal of 73439986 is 68993437.

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

It is not an unprimeable number, because it can be changed into a prime (73439981) 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, 258450 + ... + 258733.

It is an arithmetic number, because the mean of its divisors is an integer number (13963968).

Almost surely, 2^73439986 is an apocalyptic number.

73439986 is a deficient number, since it is larger than the sum of its proper divisors (38271758).

73439986 is a wasteful number, since it uses less digits than its factorization.

73439986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517256.

The product of its digits is 979776, while the sum is 49.

The square root of 73439986 is about 8569.7132974213. The cubic root of 73439986 is about 418.7718962041.

The spelling of 73439986 in words is "seventy-three million, four hundred thirty-nine thousand, nine hundred eighty-six".