247261868 has 48 divisors (see below), whose sum is σ = 528084480. Its totient is φ = 98993664.

The previous prime is 247261867. The next prime is 247261871. The reversal of 247261868 is 868162742.

It is a super-2 number, since 2×247261868² = 122276862733698848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247261867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23228 + ... + 32156.

It is an arithmetic number, because the mean of its divisors is an integer number (11001760).

Almost surely, 2^247261868 is an apocalyptic number.

247261868 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 247261868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264042240).

247261868 is an abundant number, since it is smaller than the sum of its proper divisors (280822612).

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

247261868 is a wasteful number, since it uses less digits than its factorization.

247261868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006 (or 9004 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 247261868 is about 15724.5625694326. The cubic root of 247261868 is about 627.6521901932.

The spelling of 247261868 in words is "two hundred forty-seven million, two hundred sixty-one thousand, eight hundred sixty-eight".