194782728 has 32 divisors (see below), whose sum is σ = 556522560. Its totient is φ = 55652160.

The previous prime is 194782723. The next prime is 194782739. The reversal of 194782728 is 827287491.

It is a super-2 number, since 2×194782728² = 75880622254243968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194782723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579543 + ... + 579878.

It is an arithmetic number, because the mean of its divisors is an integer number (17391330).

Almost surely, 2^194782728 is an apocalyptic number.

It is an amenable number.

194782728 is an abundant number, since it is smaller than the sum of its proper divisors (361739832).

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

194782728 is a wasteful number, since it uses less digits than its factorization.

194782728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159437 (or 1159433 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The square root of 194782728 is about 13956.4582899817. The cubic root of 194782728 is about 579.6735459761.

The spelling of 194782728 in words is "one hundred ninety-four million, seven hundred eighty-two thousand, seven hundred twenty-eight".