117561280 has 56 divisors (see below), whose sum is σ = 292132512. Its totient is φ = 44977152.

The previous prime is 117561277. The next prime is 117561281. The reversal of 117561280 is 82165711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117561281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (5216652).

Almost surely, 2^117561280 is an apocalyptic number.

117561280 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 117561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146066256).

117561280 is an abundant number, since it is smaller than the sum of its proper divisors (174571232).

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

117561280 is a wasteful number, since it uses less digits than its factorization.

117561280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013 (or 16003 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 117561280 is about 10842.5679615117. The cubic root of 117561280 is about 489.8781871295.

The spelling of 117561280 in words is "one hundred seventeen million, five hundred sixty-one thousand, two hundred eighty".