168891038 has 32 divisors (see below), whose sum is σ = 276756480. Its totient is φ = 77004000.

The previous prime is 168891011. The next prime is 168891049. The reversal of 168891038 is 830198861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 168891038.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366128 + ... + 366588.

It is an arithmetic number, because the mean of its divisors is an integer number (8648640).

Almost surely, 2^168891038 is an apocalyptic number.

168891038 is a deficient number, since it is larger than the sum of its proper divisors (107865442).

168891038 is a wasteful number, since it uses less digits than its factorization.

168891038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 168891038 is about 12995.8084781209. The cubic root of 168891038 is about 552.7586340546.

The spelling of 168891038 in words is "one hundred sixty-eight million, eight hundred ninety-one thousand, thirty-eight".