247939880 has 16 divisors (see below), whose sum is σ = 557864820. Its totient is φ = 99175936.

The previous prime is 247939859. The next prime is 247939897. The reversal of 247939880 is 88939742.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 247936516 + 3364 = 15746^2 + 58^2 .

It is a super-2 number, since 2×247939880² = 122948368188828800, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3099209 + ... + 3099288.

Almost surely, 2^247939880 is an apocalyptic number.

247939880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247939880 is an abundant number, since it is smaller than the sum of its proper divisors (309924940).

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

247939880 is a wasteful number, since it uses less digits than its factorization.

247939880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198508 (or 6198504 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 247939880 is about 15746.1068204175. The cubic root of 247939880 is about 628.2253576105.

The spelling of 247939880 in words is "two hundred forty-seven million, nine hundred thirty-nine thousand, eight hundred eighty".