194868490 has 16 divisors (see below), whose sum is σ = 359319240. Its totient is φ = 76046080.

The previous prime is 194868473. The next prime is 194868493. The reversal of 194868490 is 94868491.

It can be written as a sum of positive squares in 4 ways, for example, as 86062729 + 108805761 = 9277^2 + 10431^2 .

It is not an unprimeable number, because it can be changed into a prime (194868493) 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, 237235 + ... + 238054.

Almost surely, 2^194868490 is an apocalyptic number.

194868490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194868490 is a deficient number, since it is larger than the sum of its proper divisors (164450750).

194868490 is a wasteful number, since it uses less digits than its factorization.

194868490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475337.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 194868490 is about 13959.5304362289. The cubic root of 194868490 is about 579.7586094186.

Subtracting from 194868490 its reverse (94868491), we obtain a palindrome (99999999).

The spelling of 194868490 in words is "one hundred ninety-four million, eight hundred sixty-eight thousand, four hundred ninety".