168439634 has 16 divisors (see below), whose sum is σ = 281494656. Its totient is φ = 74934000.

The previous prime is 168439633. The next prime is 168439639. The reversal of 168439634 is 436934861.

It is not an unprimeable number, because it can be changed into a prime (168439633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80417 + ... + 82484.

It is an arithmetic number, because the mean of its divisors is an integer number (17593416).

Almost surely, 2^168439634 is an apocalyptic number.

168439634 is a deficient number, since it is larger than the sum of its proper divisors (113055022).

168439634 is a wasteful number, since it uses less digits than its factorization.

168439634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162961.

The product of its digits is 373248, while the sum is 44.

The square root of 168439634 is about 12978.4295660145. The cubic root of 168439634 is about 552.2657322572.

The spelling of 168439634 in words is "one hundred sixty-eight million, four hundred thirty-nine thousand, six hundred thirty-four".