168440942 has 4 divisors (see below), whose sum is σ = 252661416. Its totient is φ = 84220470.

The previous prime is 168440939. The next prime is 168440957. The reversal of 168440942 is 249044861.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 168440896 and 168440905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42110234 + ... + 42110237.

It is an arithmetic number, because the mean of its divisors is an integer number (63165354).

Almost surely, 2^168440942 is an apocalyptic number.

168440942 is a deficient number, since it is larger than the sum of its proper divisors (84220474).

168440942 is an equidigital number, since it uses as much as digits as its factorization.

168440942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84220473.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 168440942 is about 12978.4799572215. The cubic root of 168440942 is about 552.2671617737.

The spelling of 168440942 in words is "one hundred sixty-eight million, four hundred forty thousand, nine hundred forty-two".