194990190 has 16 divisors (see below), whose sum is σ = 467976528. Its totient is φ = 51997376.

The previous prime is 194990183. The next prime is 194990197. The reversal of 194990190 is 91099491.

It is an interprime number because it is at equal distance from previous prime (194990183) and next prime (194990197).

It is a super-2 number, since 2×194990190² = 76042348392472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194990197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3249807 + ... + 3249866.

It is an arithmetic number, because the mean of its divisors is an integer number (29248533).

Almost surely, 2^194990190 is an apocalyptic number.

194990190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194990190 is an abundant number, since it is smaller than the sum of its proper divisors (272986338).

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

194990190 is a wasteful number, since it uses less digits than its factorization.

194990190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499683.

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 194990190 is about 13963.8887850054. Note that the first 3 decimals coincide. The cubic root of 194990190 is about 579.8792753094.

The spelling of 194990190 in words is "one hundred ninety-four million, nine hundred ninety thousand, one hundred ninety".