117779520 has 112 divisors (see below), whose sum is σ = 378927360. Its totient is φ = 30990336.

The previous prime is 117779513. The next prime is 117779521. The reversal of 117779520 is 25977711.

It is not an unprimeable number, because it can be changed into a prime (117779521) 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, 75064 + ... + 76616.

It is an arithmetic number, because the mean of its divisors is an integer number (3383280).

Almost surely, 2^117779520 is an apocalyptic number.

117779520 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 117779520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189463680).

117779520 is an abundant number, since it is smaller than the sum of its proper divisors (261147840).

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

117779520 is a wasteful number, since it uses less digits than its factorization.

117779520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 39.

The square root of 117779520 is about 10852.6273316649. The cubic root of 117779520 is about 490.1811353094.

The spelling of 117779520 in words is "one hundred seventeen million, seven hundred seventy-nine thousand, five hundred twenty".