247243864 has 16 divisors (see below), whose sum is σ = 529808400. Its totient is φ = 105961632.

The previous prime is 247243861. The next prime is 247243877. The reversal of 247243864 is 468342742.

247243864 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×247243864³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247243861) 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, 2207479 + ... + 2207590.

It is an arithmetic number, because the mean of its divisors is an integer number (33113025).

Almost surely, 2^247243864 is an apocalyptic number.

It is an amenable number.

247243864 is an abundant number, since it is smaller than the sum of its proper divisors (282564536).

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

247243864 is a wasteful number, since it uses less digits than its factorization.

247243864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415082 (or 4415078 counting only the distinct ones).

The product of its digits is 258048, while the sum is 40.

The square root of 247243864 is about 15723.9900788572. The cubic root of 247243864 is about 627.6369559742.

The spelling of 247243864 in words is "two hundred forty-seven million, two hundred forty-three thousand, eight hundred sixty-four".