117978570 has 96 divisors (see below), whose sum is σ = 320112000. Its totient is φ = 30119040.

The previous prime is 117978557. The next prime is 117978571. The reversal of 117978570 is 75879711.

It is a happy number.

117978570 is a `hidden beast` number, since 1 + 1 + 7 + 9 + 78 + 570 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (117978571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236181 + ... + 236679.

It is an arithmetic number, because the mean of its divisors is an integer number (3334500).

Almost surely, 2^117978570 is an apocalyptic number.

117978570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117978570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160056000).

117978570 is an abundant number, since it is smaller than the sum of its proper divisors (202133430).

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

117978570 is a wasteful number, since it uses less digits than its factorization.

117978570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 45.

The square root of 117978570 is about 10861.7940507082. The cubic root of 117978570 is about 490.4571188903.

The spelling of 117978570 in words is "one hundred seventeen million, nine hundred seventy-eight thousand, five hundred seventy".