117993870 has 24 divisors (see below), whose sum is σ = 306784296. Its totient is φ = 31465008.

The previous prime is 117993839. The next prime is 117993871. The reversal of 117993870 is 78399711.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117993871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655432 + ... + 655611.

It is an arithmetic number, because the mean of its divisors is an integer number (12782679).

Almost surely, 2^117993870 is an apocalyptic number.

117993870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117993870 is an abundant number, since it is smaller than the sum of its proper divisors (188790426).

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

117993870 is a wasteful number, since it uses less digits than its factorization.

117993870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311056 (or 1311053 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 117993870 is about 10862.4983314153. The cubic root of 117993870 is about 490.4783195472.

The spelling of 117993870 in words is "one hundred seventeen million, nine hundred ninety-three thousand, eight hundred seventy".