190779894 has 32 divisors (see below), whose sum is σ = 442391040. Its totient is φ = 60827976.

The previous prime is 190779877. The next prime is 190779943. The reversal of 190779894 is 498977091.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 190779894.

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 15 ways as a sum of consecutive naturals, for example, 75562 + ... + 78045.

It is an arithmetic number, because the mean of its divisors is an integer number (13824720).

Almost surely, 2^190779894 is an apocalyptic number.

190779894 is an abundant number, since it is smaller than the sum of its proper divisors (251611146).

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

190779894 is a wasteful number, since it uses less digits than its factorization.

190779894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153641 (or 153635 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 190779894 is about 13812.3095099987. The cubic root of 190779894 is about 575.6752183797.

The spelling of 190779894 in words is "one hundred ninety million, seven hundred seventy-nine thousand, eight hundred ninety-four".