28231573798 has 4 divisors (see below), whose sum is σ = 42347360700. Its totient is φ = 14115786898.

The previous prime is 28231573793. The next prime is 28231573819. The reversal of 28231573798 is 89737513282.

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

It is a super-2 number, since 2×28231573798² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231573793) by changing a digit.

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 as a sum of consecutive naturals, namely, 7057893448 + ... + 7057893451.

It is an arithmetic number, because the mean of its divisors is an integer number (10586840175).

Almost surely, 2^28231573798 is an apocalyptic number.

28231573798 is a deficient number, since it is larger than the sum of its proper divisors (14115786902).

28231573798 is a wasteful number, since it uses less digits than its factorization.

28231573798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14115786901.

The product of its digits is 5080320, while the sum is 55.

The spelling of 28231573798 in words is "twenty-eight billion, two hundred thirty-one million, five hundred seventy-three thousand, seven hundred ninety-eight".