52239986 has 8 divisors (see below), whose sum is σ = 80271324. Its totient is φ = 25482880.

The previous prime is 52239937. The next prime is 52239989. The reversal of 52239986 is 68993225.

It can be written as a sum of positive squares in 2 ways, for example, as 52113961 + 126025 = 7219^2 + 355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×52239986² = 5458032274560392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52239989) 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, 318455 + ... + 318618.

Almost surely, 2^52239986 is an apocalyptic number.

52239986 is a deficient number, since it is larger than the sum of its proper divisors (28031338).

52239986 is a wasteful number, since it uses less digits than its factorization.

52239986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637116.

The product of its digits is 233280, while the sum is 44.

The square root of 52239986 is about 7227.7234313441. The cubic root of 52239986 is about 373.8244335968.

The spelling of 52239986 in words is "fifty-two million, two hundred thirty-nine thousand, nine hundred eighty-six".