117899790 has 48 divisors (see below), whose sum is σ = 293115888. Its totient is φ = 30349312.

The previous prime is 117899779. The next prime is 117899801. The reversal of 117899790 is 97998711.

It is an interprime number because it is at equal distance from previous prime (117899779) and next prime (117899801).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22894 + ... + 27566.

It is an arithmetic number, because the mean of its divisors is an integer number (6106581).

Almost surely, 2^117899790 is an apocalyptic number.

117899790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117899790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146557944).

117899790 is an abundant number, since it is smaller than the sum of its proper divisors (175216098).

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

117899790 is a wasteful number, since it uses less digits than its factorization.

117899790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741 (or 4712 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 117899790 is about 10858.1669723761. The cubic root of 117899790 is about 490.3479272656.

The spelling of 117899790 in words is "one hundred seventeen million, eight hundred ninety-nine thousand, seven hundred ninety".