194428538528 has 24 divisors (see below), whose sum is σ = 437464212192. Its totient is φ = 83326516416.

The previous prime is 194428538519. The next prime is 194428538567. The reversal of 194428538528 is 825835824491.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433992050 + ... + 433992497.

It is an arithmetic number, because the mean of its divisors is an integer number (18227675508).

Almost surely, 2^194428538528 is an apocalyptic number.

It is an amenable number.

194428538528 is an abundant number, since it is smaller than the sum of its proper divisors (243035673664).

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

194428538528 is an equidigital number, since it uses as much as digits as its factorization.

194428538528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867984564 (or 867984556 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 59.

The spelling of 194428538528 in words is "one hundred ninety-four billion, four hundred twenty-eight million, five hundred thirty-eight thousand, five hundred twenty-eight".