194703990 has 128 divisors (see below), whose sum is σ = 525837312. Its totient is φ = 45826560.

The previous prime is 194703967. The next prime is 194703991. The reversal of 194703990 is 99307491.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194703991) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1486225 + ... + 1486355.

It is an arithmetic number, because the mean of its divisors is an integer number (4108104).

Almost surely, 2^194703990 is an apocalyptic number.

194703990 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 194703990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262918656).

194703990 is an abundant number, since it is smaller than the sum of its proper divisors (331133322).

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

194703990 is a wasteful number, since it uses less digits than its factorization.

194703990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294.

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

The square root of 194703990 is about 13953.6371602532. The cubic root of 194703990 is about 579.5954273332.

The spelling of 194703990 in words is "one hundred ninety-four million, seven hundred three thousand, nine hundred ninety".