117172240 has 80 divisors (see below), whose sum is σ = 289177920. Its totient is φ = 44029440.

The previous prime is 117172199. The next prime is 117172243. The reversal of 117172240 is 42271711.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (117172243) 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, 238395 + ... + 238885.

It is an arithmetic number, because the mean of its divisors is an integer number (3614724).

Almost surely, 2^117172240 is an apocalyptic number.

117172240 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 117172240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144588960).

117172240 is an abundant number, since it is smaller than the sum of its proper divisors (172005680).

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

117172240 is a wasteful number, since it uses less digits than its factorization.

117172240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 117172240 is about 10824.6126951499. The cubic root of 117172240 is about 489.3372130222.

The spelling of 117172240 in words is "one hundred seventeen million, one hundred seventy-two thousand, two hundred forty".