247639852 has 6 divisors (see below), whose sum is σ = 433369748. Its totient is φ = 123819924.

The previous prime is 247639841. The next prime is 247639859. The reversal of 247639852 is 258936742.

It is a super-2 number, since 2×247639852² = 122650992597163808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247639859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30954978 + ... + 30954985.

Almost surely, 2^247639852 is an apocalyptic number.

It is an amenable number.

247639852 is a deficient number, since it is larger than the sum of its proper divisors (185729896).

247639852 is a wasteful number, since it uses less digits than its factorization.

247639852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61909967 (or 61909965 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 247639852 is about 15736.5768831725. The cubic root of 247639852 is about 627.9718535805.

The spelling of 247639852 in words is "two hundred forty-seven million, six hundred thirty-nine thousand, eight hundred fifty-two".