117643842 has 48 divisors (see below), whose sum is σ = 276500952. Its totient is φ = 36003840.

The previous prime is 117643793. The next prime is 117643843. The reversal of 117643842 is 248346711.

117643842 is a `hidden beast` number, since 1 + 1 + 7 + 643 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 62869041 + 54774801 = 7929^2 + 7401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 117643797 and 117643806.

It is not an unprimeable number, because it can be changed into a prime (117643843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7858 + ... + 17234.

Almost surely, 2^117643842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117643842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138250476).

117643842 is an abundant number, since it is smaller than the sum of its proper divisors (158857110).

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

117643842 is a wasteful number, since it uses less digits than its factorization.

117643842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9443 (or 9440 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 117643842 is about 10846.3746016814. The cubic root of 117643842 is about 489.9928389902.

The spelling of 117643842 in words is "one hundred seventeen million, six hundred forty-three thousand, eight hundred forty-two".