28256323898 has 24 divisors (see below), whose sum is σ = 49039908960. Its totient is φ = 12167793000.

The previous prime is 28256323891. The next prime is 28256323919. The reversal of 28256323898 is 89832365282.

It is not an unprimeable number, because it can be changed into a prime (28256323891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3068078 + ... + 3077273.

It is an arithmetic number, because the mean of its divisors is an integer number (2043329540).

Almost surely, 2^28256323898 is an apocalyptic number.

28256323898 is a deficient number, since it is larger than the sum of its proper divisors (20783585062).

28256323898 is a wasteful number, since it uses less digits than its factorization.

28256323898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145394 (or 6145383 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The spelling of 28256323898 in words is "twenty-eight billion, two hundred fifty-six million, three hundred twenty-three thousand, eight hundred ninety-eight".