117561390 has 32 divisors (see below), whose sum is σ = 286017696. Its totient is φ = 30919680.

The previous prime is 117561361. The next prime is 117561397. The reversal of 117561390 is 93165711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117561397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24651 + ... + 29030.

It is an arithmetic number, because the mean of its divisors is an integer number (8938053).

Almost surely, 2^117561390 is an apocalyptic number.

117561390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117561390 is an abundant number, since it is smaller than the sum of its proper divisors (168456306).

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

117561390 is a wasteful number, since it uses less digits than its factorization.

117561390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53764.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 117561390 is about 10842.5730341096. The cubic root of 117561390 is about 489.8783399196.

The spelling of 117561390 in words is "one hundred seventeen million, five hundred sixty-one thousand, three hundred ninety".