194668290 has 48 divisors (see below), whose sum is σ = 507352248. Its totient is φ = 51787008.

The previous prime is 194668247. The next prime is 194668301. The reversal of 194668290 is 92866491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160199649 + 34468641 = 12657^2 + 5871^2 .

It is a super-4 number, since 4×194668290⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 38764 + ... + 43496.

Almost surely, 2^194668290 is an apocalyptic number.

194668290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194668290 is an abundant number, since it is smaller than the sum of its proper divisors (312683958).

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

194668290 is a wasteful number, since it uses less digits than its factorization.

194668290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203 (or 5200 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 194668290 is about 13952.3578652499. The cubic root of 194668290 is about 579.5600012119.

The spelling of 194668290 in words is "one hundred ninety-four million, six hundred sixty-eight thousand, two hundred ninety".