72786586 has 4 divisors (see below), whose sum is σ = 109179882. Its totient is φ = 36393292.

The previous prime is 72786583. The next prime is 72786617. The reversal of 72786586 is 68568727.

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., 63696361 + 9090225 = 7981^2 + 3015^2 .

It is not an unprimeable number, because it can be changed into a prime (72786583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18196645 + ... + 18196648.

Almost surely, 2^72786586 is an apocalyptic number.

72786586 is a deficient number, since it is larger than the sum of its proper divisors (36393296).

72786586 is a wasteful number, since it uses less digits than its factorization.

72786586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36393295.

The product of its digits is 1128960, while the sum is 49.

The square root of 72786586 is about 8531.5054943427. The cubic root of 72786586 is about 417.5262483647.

The spelling of 72786586 in words is "seventy-two million, seven hundred eighty-six thousand, five hundred eighty-six".