247940880 has 160 divisors (see below), whose sum is σ = 882800640. Its totient is φ = 56931840.

The previous prime is 247940863. The next prime is 247940887. The reversal of 247940880 is 88049742.

It is a super-2 number, since 2×247940880² = 122949359950348800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (247940887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47689 + ... + 52631.

It is an arithmetic number, because the mean of its divisors is an integer number (5517504).

Almost surely, 2^247940880 is an apocalyptic number.

247940880 is a gapful number since it is divisible by the number (20) 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 247940880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441400320).

247940880 is an abundant number, since it is smaller than the sum of its proper divisors (634859760).

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

247940880 is a wasteful number, since it uses less digits than its factorization.

247940880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4983 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 247940880 is about 15746.1385742664. The cubic root of 247940880 is about 628.2262022031.

The spelling of 247940880 in words is "two hundred forty-seven million, nine hundred forty thousand, eight hundred eighty".