117428220 has 288 divisors, whose sum is σ = 449100288. Its totient is φ = 24178176.

The previous prime is 117428219. The next prime is 117428237. The reversal of 117428220 is 22824711.

117428220 is a `hidden beast` number, since 1 + 17 + 428 + 220 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1097407 + ... + 1097513.

It is an arithmetic number, because the mean of its divisors is an integer number (1559376).

Almost surely, 2^117428220 is an apocalyptic number.

117428220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117428220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224550144).

117428220 is an abundant number, since it is smaller than the sum of its proper divisors (331672068).

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

117428220 is a wasteful number, since it uses less digits than its factorization.

117428220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 117428220 is about 10836.4302240175. The cubic root of 117428220 is about 489.6932968911.

The spelling of 117428220 in words is "one hundred seventeen million, four hundred twenty-eight thousand, two hundred twenty".