194385457 has 16 divisors (see below), whose sum is σ = 228792832. Its totient is φ = 161663040.

The previous prime is 194385439. The next prime is 194385473. The reversal of 194385457 is 754583491.

It is not a de Polignac number, because 194385457 - 2⁷ = 194385329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194385557) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 119107 + ... + 120727.

It is an arithmetic number, because the mean of its divisors is an integer number (14299552).

Almost surely, 2^194385457 is an apocalyptic number.

It is an amenable number.

194385457 is a deficient number, since it is larger than the sum of its proper divisors (34407375).

194385457 is a wasteful number, since it uses less digits than its factorization.

194385457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128.

The product of its digits is 604800, while the sum is 46.

The square root of 194385457 is about 13942.2185106962. The cubic root of 194385457 is about 579.2791848145.

The spelling of 194385457 in words is "one hundred ninety-four million, three hundred eighty-five thousand, four hundred fifty-seven".