247664368 has 80 divisors (see below), whose sum is σ = 579962880. Its totient is φ = 100159488.

The previous prime is 247664317. The next prime is 247664371. The reversal of 247664368 is 863466742.

247664368 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 2×247664368² = 122675278353678848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202896 + ... + 204112.

It is an arithmetic number, because the mean of its divisors is an integer number (7249536).

Almost surely, 2^247664368 is an apocalyptic number.

247664368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247664368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289981440).

247664368 is an abundant number, since it is smaller than the sum of its proper divisors (332298512).

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

247664368 is a wasteful number, since it uses less digits than its factorization.

247664368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1328 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 46.

The square root of 247664368 is about 15737.3558134777. The cubic root of 247664368 is about 627.9925756760.

The spelling of 247664368 in words is "two hundred forty-seven million, six hundred sixty-four thousand, three hundred sixty-eight".