72617986 has 16 divisors (see below), whose sum is σ = 124695936. Its totient is φ = 31070016.

The previous prime is 72617977. The next prime is 72617989. The reversal of 72617986 is 68971627.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72617989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5050 + ... + 13066.

It is an arithmetic number, because the mean of its divisors is an integer number (7793496).

Almost surely, 2^72617986 is an apocalyptic number.

72617986 is a deficient number, since it is larger than the sum of its proper divisors (52077950).

72617986 is a wasteful number, since it uses less digits than its factorization.

72617986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673.

The product of its digits is 254016, while the sum is 46.

The square root of 72617986 is about 8521.6187429385. The cubic root of 72617986 is about 417.2036186387.

The spelling of 72617986 in words is "seventy-two million, six hundred seventeen thousand, nine hundred eighty-six".