117455778 has 64 divisors (see below), whose sum is σ = 288460800. Its totient is φ = 35128080.

The previous prime is 117455749. The next prime is 117455783. The reversal of 117455778 is 877554711.

117455778 is a `hidden beast` number, since 1 + 1 + 74 + 5 + 577 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45675 + ... + 48177.

It is an arithmetic number, because the mean of its divisors is an integer number (4507200).

Almost surely, 2^117455778 is an apocalyptic number.

117455778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117455778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144230400).

117455778 is an abundant number, since it is smaller than the sum of its proper divisors (171005022).

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

117455778 is a wasteful number, since it uses less digits than its factorization.

117455778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 2598 counting only the distinct ones).

The product of its digits is 274400, while the sum is 45.

The square root of 117455778 is about 10837.7016936249. The cubic root of 117455778 is about 489.7316008932.

The spelling of 117455778 in words is "one hundred seventeen million, four hundred fifty-five thousand, seven hundred seventy-eight".