117552978 has 64 divisors (see below), whose sum is σ = 268554240. Its totient is φ = 38102400.

The previous prime is 117552971. The next prime is 117552989. The reversal of 117552978 is 879255711.

117552978 is a `hidden beast` number, since 1 + 1 + 7 + 552 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (117552971) 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, 418198 + ... + 418478.

It is an arithmetic number, because the mean of its divisors is an integer number (4196160).

Almost surely, 2^117552978 is an apocalyptic number.

117552978 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 117552978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134277120).

117552978 is an abundant number, since it is smaller than the sum of its proper divisors (151001262).

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

117552978 is a wasteful number, since it uses less digits than its factorization.

117552978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The square root of 117552978 is about 10842.1851118674. The cubic root of 117552978 is about 489.8666553722.

The spelling of 117552978 in words is "one hundred seventeen million, five hundred fifty-two thousand, nine hundred seventy-eight".