117505428 has 48 divisors (see below), whose sum is σ = 292590144. Its totient is φ = 36574720.

The previous prime is 117505397. The next prime is 117505433. The reversal of 117505428 is 824505711.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 24526 + ... + 28922.

It is an arithmetic number, because the mean of its divisors is an integer number (6095628).

Almost surely, 2^117505428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117505428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146295072).

117505428 is an abundant number, since it is smaller than the sum of its proper divisors (175084716).

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

117505428 is a wasteful number, since it uses less digits than its factorization.

117505428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 117505428 is about 10839.9920664178. The cubic root of 117505428 is about 489.8005963599.

The spelling of 117505428 in words is "one hundred seventeen million, five hundred five thousand, four hundred twenty-eight".