247985536 has 32 divisors (see below), whose sum is σ = 504557280. Its totient is φ = 121351680.

The previous prime is 247985533. The next prime is 247985567. The reversal of 247985536 is 635589742.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×247985536² = 122993652130414592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247985536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247985533) 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, 14595 + ... + 26626.

It is an arithmetic number, because the mean of its divisors is an integer number (15767415).

Almost surely, 2^247985536 is an apocalyptic number.

It is an amenable number.

247985536 is an abundant number, since it is smaller than the sum of its proper divisors (256571744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247985536 is an equidigital number, since it uses as much as digits as its factorization.

247985536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41282 (or 41270 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The square root of 247985536 is about 15747.5565088683. The cubic root of 247985536 is about 628.2639160124.

The spelling of 247985536 in words is "two hundred forty-seven million, nine hundred eighty-five thousand, five hundred thirty-six".