117845442 has 80 divisors (see below), whose sum is σ = 310286592. Its totient is φ = 32957280.

The previous prime is 117845437. The next prime is 117845449. The reversal of 117845442 is 244548711.

It is a happy number.

117845442 is a `hidden beast` number, since 1 + 178 + 45 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 117845397 and 117845406.

It is not an unprimeable number, because it can be changed into a prime (117845449) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20623 + ... + 25709.

Almost surely, 2^117845442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117845442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155143296).

117845442 is an abundant number, since it is smaller than the sum of its proper divisors (192441150).

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

117845442 is a wasteful number, since it uses less digits than its factorization.

117845442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5116 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 117845442 is about 10855.6640515447. The cubic root of 117845442 is about 490.2725708265.

The spelling of 117845442 in words is "one hundred seventeen million, eight hundred forty-five thousand, four hundred forty-two".