194975790 has 16 divisors (see below), whose sum is σ = 467941968. Its totient is φ = 51993536.

The previous prime is 194975789. The next prime is 194975791. The reversal of 194975790 is 97579491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (194975789) and next prime (194975791).

It is a super-2 number, since 2×194975790² = 76031117372248200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194975791) 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, 3249567 + ... + 3249626.

It is an arithmetic number, because the mean of its divisors is an integer number (29246373).

Almost surely, 2^194975790 is an apocalyptic number.

194975790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194975790 is an abundant number, since it is smaller than the sum of its proper divisors (272966178).

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

194975790 is a wasteful number, since it uses less digits than its factorization.

194975790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499203.

The product of its (nonzero) digits is 714420, while the sum is 51.

The square root of 194975790 is about 13963.3731598063. The cubic root of 194975790 is about 579.8650002884.

The spelling of 194975790 in words is "one hundred ninety-four million, nine hundred seventy-five thousand, seven hundred ninety".