194528257 has 32 divisors (see below), whose sum is σ = 248647680. Its totient is φ = 147813120.

The previous prime is 194528249. The next prime is 194528287. The reversal of 194528257 is 752825491.

It is not a de Polignac number, because 194528257 - 2³ = 194528249 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194528287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687238 + ... + 687520.

It is an arithmetic number, because the mean of its divisors is an integer number (7770240).

Almost surely, 2^194528257 is an apocalyptic number.

It is an amenable number.

194528257 is a deficient number, since it is larger than the sum of its proper divisors (54119423).

194528257 is a wasteful number, since it uses less digits than its factorization.

194528257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its digits is 201600, while the sum is 43.

The square root of 194528257 is about 13947.3387067211. The cubic root of 194528257 is about 579.4210006700.

The spelling of 194528257 in words is "one hundred ninety-four million, five hundred twenty-eight thousand, two hundred fifty-seven".