194252490 has 48 divisors (see below), whose sum is σ = 506919816. Its totient is φ = 51609600.

The previous prime is 194252483. The next prime is 194252533. The reversal of 194252490 is 94252491.

194252490 is a `hidden beast` number, since 1 + 9 + 42 + 524 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 180391761 + 13860729 = 13431^2 + 3723^2 .

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, 21450 + ... + 29130.

Almost surely, 2^194252490 is an apocalyptic number.

194252490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194252490 is an abundant number, since it is smaller than the sum of its proper divisors (312667326).

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

194252490 is a wasteful number, since it uses less digits than its factorization.

194252490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7975 (or 7972 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 194252490 is about 13937.4491927325. The cubic root of 194252490 is about 579.1470717338.

Subtracting from 194252490 its reverse (94252491), we obtain a palindrome (99999999).

The spelling of 194252490 in words is "one hundred ninety-four million, two hundred fifty-two thousand, four hundred ninety".