28399354589824 has 32 divisors (see below), whose sum is σ = 56579538584340. Its totient is φ = 14198999808000.

The previous prime is 28399354589783. The next prime is 28399354589833. The reversal of 28399354589824 is 42898545399382.

It can be written as a sum of positive squares in 2 ways, for example, as 27728986652224 + 670367937600 = 5265832^2 + 818760^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×28399354589824² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594239 + ... + 7970494.

Almost surely, 2^{28399354589824} is an apocalyptic number.

It is an amenable number.

28399354589824 is a deficient number, since it is larger than the sum of its proper divisors (28180183994516).

28399354589824 is a wasteful number, since it uses less digits than its factorization.

28399354589824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585748 (or 10585736 counting only the distinct ones).

The product of its digits is 5374771200, while the sum is 79.

The spelling of 28399354589824 in words is "twenty-eight trillion, three hundred ninety-nine billion, three hundred fifty-four million, five hundred eighty-nine thousand, eight hundred twenty-four".