117191730 has 32 divisors (see below), whose sum is σ = 282170304. Its totient is φ = 31150016.

The previous prime is 117191719. The next prime is 117191731. The reversal of 117191730 is 37191711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (117191731) 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, 3349 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (8817822).

Almost surely, 2^117191730 is an apocalyptic number.

117191730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117191730 is an abundant number, since it is smaller than the sum of its proper divisors (164978574).

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

117191730 is a wasteful number, since it uses less digits than its factorization.

117191730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12650.

The product of its (nonzero) digits is 1323, while the sum is 30.

The square root of 117191730 is about 10825.5129208735. The cubic root of 117191730 is about 489.3643430362.

The spelling of 117191730 in words is "one hundred seventeen million, one hundred ninety-one thousand, seven hundred thirty".