247343664 has 20 divisors (see below), whose sum is σ = 638971256. Its totient is φ = 82447872.

The previous prime is 247343641. The next prime is 247343717. The reversal of 247343664 is 466343742.

247343664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247343664² = 122357776241889792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576449 + ... + 2576544.

Almost surely, 2^247343664 is an apocalyptic number.

247343664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

247343664 is an abundant number, since it is smaller than the sum of its proper divisors (391627592).

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

247343664 is a wasteful number, since it uses less digits than its factorization.

247343664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153004 (or 5152998 counting only the distinct ones).

The product of its digits is 290304, while the sum is 39.

The square root of 247343664 is about 15727.1632534288. The cubic root of 247343664 is about 627.7213931788.

The spelling of 247343664 in words is "two hundred forty-seven million, three hundred forty-three thousand, six hundred sixty-four".