117147520 has 128 divisors (see below), whose sum is σ = 325094400. Its totient is φ = 39536640.

The previous prime is 117147517. The next prime is 117147623. The reversal of 117147520 is 25741711.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353755 + ... + 354085.

It is an arithmetic number, because the mean of its divisors is an integer number (2539800).

Almost surely, 2^117147520 is an apocalyptic number.

117147520 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 117147520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162547200).

117147520 is an abundant number, since it is smaller than the sum of its proper divisors (207946880).

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

117147520 is an equidigital number, since it uses as much as digits as its factorization.

117147520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 117147520 is about 10823.4707926801. The cubic root of 117147520 is about 489.3027985378.

The spelling of 117147520 in words is "one hundred seventeen million, one hundred forty-seven thousand, five hundred twenty".