194639490 has 32 divisors (see below), whose sum is σ = 519039360. Its totient is φ = 51903792.

The previous prime is 194639461. The next prime is 194639491. The reversal of 194639490 is 94936491.

194639490 is a `hidden beast` number, since 1 + 9 + 4 + 639 + 4 + 9 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (194639491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360174 + ... + 360713.

It is an arithmetic number, because the mean of its divisors is an integer number (16219980).

Almost surely, 2^194639490 is an apocalyptic number.

194639490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194639490 is an abundant number, since it is smaller than the sum of its proper divisors (324399870).

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

194639490 is a wasteful number, since it uses less digits than its factorization.

194639490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720903 (or 720897 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 194639490 is about 13951.3257434554. The cubic root of 194639490 is about 579.5314189995.

The spelling of 194639490 in words is "one hundred ninety-four million, six hundred thirty-nine thousand, four hundred ninety".