247129872 has 40 divisors (see below), whose sum is σ = 696458400. Its totient is φ = 74887680.

The previous prime is 247129859. The next prime is 247129873. The reversal of 247129872 is 278921742.

It is a super-2 number, since 2×247129872² = 122146347269472768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247129873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233497 + ... + 234552.

It is an arithmetic number, because the mean of its divisors is an integer number (17411460).

Almost surely, 2^247129872 is an apocalyptic number.

247129872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

247129872 is an abundant number, since it is smaller than the sum of its proper divisors (449328528).

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

247129872 is a wasteful number, since it uses less digits than its factorization.

247129872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468071 (or 468065 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 247129872 is about 15720.3648812615. The cubic root of 247129872 is about 627.5404836238.

The spelling of 247129872 in words is "two hundred forty-seven million, one hundred twenty-nine thousand, eight hundred seventy-two".