28194594434 has 16 divisors (see below), whose sum is σ = 43014699000. Its totient is φ = 13858312704.

The previous prime is 28194594427. The next prime is 28194594529. The reversal of 28194594434 is 43449549182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15774606409 + 12419988025 = 125597^2 + 111445^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458789 + ... + 516600.

Almost surely, 2^28194594434 is an apocalyptic number.

28194594434 is a deficient number, since it is larger than the sum of its proper divisors (14820104566).

28194594434 is a wasteful number, since it uses less digits than its factorization.

28194594434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975637.

The product of its digits is 4976640, while the sum is 53.

The spelling of 28194594434 in words is "twenty-eight billion, one hundred ninety-four million, five hundred ninety-four thousand, four hundred thirty-four".