194073990 has 64 divisors (see below), whose sum is σ = 511660800. Its totient is φ = 46720640.

The previous prime is 194073983. The next prime is 194074019. The reversal of 194073990 is 99370491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47197 + ... + 51143.

It is an arithmetic number, because the mean of its divisors is an integer number (7994700).

Almost surely, 2^194073990 is an apocalyptic number.

194073990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 194073990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255830400).

194073990 is an abundant number, since it is smaller than the sum of its proper divisors (317586810).

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

194073990 is a wasteful number, since it uses less digits than its factorization.

194073990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 194073990 is about 13931.0441101879. The cubic root of 194073990 is about 578.9696232434.

The spelling of 194073990 in words is "one hundred ninety-four million, seventy-three thousand, nine hundred ninety".