28144604775 has 72 divisors (see below), whose sum is σ = 54510316672. Its totient is φ = 12551904000.

The previous prime is 28144604731. The next prime is 28144604783. The reversal of 28144604775 is 57740644182.

It is not a de Polignac number, because 28144604775 - 2¹⁷ = 28144473703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 866580 + ... + 898470.

Almost surely, 2^28144604775 is an apocalyptic number.

28144604775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28144604775 is a deficient number, since it is larger than the sum of its proper divisors (26365711897).

28144604775 is a wasteful number, since it uses less digits than its factorization.

28144604775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31993 (or 31947 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 48.

The spelling of 28144604775 in words is "twenty-eight billion, one hundred forty-four million, six hundred four thousand, seven hundred seventy-five".