72324986 has 4 divisors (see below), whose sum is σ = 108487482. Its totient is φ = 36162492.

The previous prime is 72324983. The next prime is 72324991. The reversal of 72324986 is 68942327.

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: 68942327 = 17 ⋅4055431.

It can be written as a sum of positive squares in only one way, i.e., 71081761 + 1243225 = 8431^2 + 1115^2 .

It is not an unprimeable number, because it can be changed into a prime (72324983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18081245 + ... + 18081248.

Almost surely, 2^72324986 is an apocalyptic number.

72324986 is a deficient number, since it is larger than the sum of its proper divisors (36162496).

72324986 is a wasteful number, since it uses less digits than its factorization.

72324986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36162495.

The product of its digits is 145152, while the sum is 41.

The square root of 72324986 is about 8504.4097972758. The cubic root of 72324986 is about 416.6417494077.

The spelling of 72324986 in words is "seventy-two million, three hundred twenty-four thousand, nine hundred eighty-six".