194287490 has 8 divisors (see below), whose sum is σ = 349717500. Its totient is φ = 77714992.

The previous prime is 194287487. The next prime is 194287537. The reversal of 194287490 is 94782491.

It can be written as a sum of positive squares in 2 ways, for example, as 164070481 + 30217009 = 12809^2 + 5497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 9714365 + ... + 9714384.

Almost surely, 2^194287490 is an apocalyptic number.

194287490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194287490 is a deficient number, since it is larger than the sum of its proper divisors (155430010).

194287490 is a wasteful number, since it uses less digits than its factorization.

194287490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19428756.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 194287490 is about 13938.7047461376. The cubic root of 194287490 is about 579.1818528070.

The spelling of 194287490 in words is "one hundred ninety-four million, two hundred eighty-seven thousand, four hundred ninety".