72986 has 4 divisors (see below), whose sum is σ = 109482. Its totient is φ = 36492.

The previous prime is 72977. The next prime is 72997. The reversal of 72986 is 68927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72361 + 625 = 269^2 + 25^2 .

It is an unprimeable number.

72986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18245 + ... + 18248.

2⁷²⁹⁸⁶ is an apocalyptic number.

72986 is a deficient number, since it is larger than the sum of its proper divisors (36496).

72986 is a wasteful number, since it uses less digits than its factorization.

72986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36495.

The product of its digits is 6048, while the sum is 32.

The square root of 72986 is about 270.1592123175. The cubic root of 72986 is about 41.7907200693.

It can be divided in two parts, 7 and 2986, that multiplied together give a palindrome (20902).

The spelling of 72986 in words is "seventy-two thousand, nine hundred eighty-six".