117281440 has 24 divisors (see below), whose sum is σ = 277077780. Its totient is φ = 46912512.

The previous prime is 117281387. The next prime is 117281459. The reversal of 117281440 is 44182711.

It can be written as a sum of positive squares in 2 ways, for example, as 116035984 + 1245456 = 10772^2 + 1116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 117281399 and 117281408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366345 + ... + 366664.

Almost surely, 2^117281440 is an apocalyptic number.

117281440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117281440 is an abundant number, since it is smaller than the sum of its proper divisors (159796340).

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

117281440 is an equidigital number, since it uses as much as digits as its factorization.

117281440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733024 (or 733016 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 117281440 is about 10829.6555808576. The cubic root of 117281440 is about 489.4891802807.

The spelling of 117281440 in words is "one hundred seventeen million, two hundred eighty-one thousand, four hundred forty".