189791768 has 16 divisors (see below), whose sum is σ = 371332080. Its totient is φ = 90769888.

The previous prime is 189791753. The next prime is 189791783. The reversal of 189791768 is 867197981.

It is an interprime number because it is at equal distance from previous prime (189791753) and next prime (189791783).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515555 + ... + 515922.

It is an arithmetic number, because the mean of its divisors is an integer number (23208255).

Almost surely, 2^189791768 is an apocalyptic number.

It is an amenable number.

189791768 is a deficient number, since it is larger than the sum of its proper divisors (181540312).

189791768 is a wasteful number, since it uses less digits than its factorization.

189791768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031506 (or 1031502 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 56.

The square root of 189791768 is about 13776.4933128863. The cubic root of 189791768 is about 574.6796128193.

The spelling of 189791768 in words is "one hundred eighty-nine million, seven hundred ninety-one thousand, seven hundred sixty-eight".