72371986 has 8 divisors (see below), whose sum is σ = 110337804. Its totient is φ = 35592720.

The previous prime is 72371953. The next prime is 72371987. The reversal of 72371986 is 68917327.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71723961 + 648025 = 8469^2 + 805^2 .

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 (72371987) 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, 296485 + ... + 296728.

Almost surely, 2^72371986 is an apocalyptic number.

72371986 is a deficient number, since it is larger than the sum of its proper divisors (37965818).

72371986 is a wasteful number, since it uses less digits than its factorization.

72371986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593276.

The product of its digits is 127008, while the sum is 43.

The square root of 72371986 is about 8507.1726207948. The cubic root of 72371986 is about 416.7319806590.

The spelling of 72371986 in words is "seventy-two million, three hundred seventy-one thousand, nine hundred eighty-six".