28193593438 has 4 divisors (see below), whose sum is σ = 42290390160. Its totient is φ = 14096796718.

The previous prime is 28193593427. The next prime is 28193593447. The reversal of 28193593438 is 83439539182.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7048398358 + ... + 7048398361.

It is an arithmetic number, because the mean of its divisors is an integer number (10572597540).

Almost surely, 2^28193593438 is an apocalyptic number.

28193593438 is a deficient number, since it is larger than the sum of its proper divisors (14096796722).

28193593438 is a wasteful number, since it uses less digits than its factorization.

28193593438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14096796721.

The product of its digits is 5598720, while the sum is 55.

The spelling of 28193593438 in words is "twenty-eight billion, one hundred ninety-three million, five hundred ninety-three thousand, four hundred thirty-eight".