194428745 has 64 divisors (see below), whose sum is σ = 297271296. Its totient is φ = 119024640.

The previous prime is 194428727. The next prime is 194428753. The reversal of 194428745 is 547824491.

It is not a de Polignac number, because 194428745 - 2¹² = 194424649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194428696 and 194428705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1530872 + ... + 1530998.

It is an arithmetic number, because the mean of its divisors is an integer number (4644864).

Almost surely, 2^194428745 is an apocalyptic number.

It is an amenable number.

194428745 is a deficient number, since it is larger than the sum of its proper divisors (102842551).

194428745 is a wasteful number, since it uses less digits than its factorization.

194428745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 322560, while the sum is 44.

The square root of 194428745 is about 13943.7708314501. The cubic root of 194428745 is about 579.3221818175.

The spelling of 194428745 in words is "one hundred ninety-four million, four hundred twenty-eight thousand, seven hundred forty-five".