28534825988 has 24 divisors (see below), whose sum is σ = 50269239552. Its totient is φ = 14172241824.

The previous prime is 28534825987. The next prime is 28534826027. The reversal of 28534825988 is 88952843582.

It is a super-2 number, since 2×28534825988² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28534825988.

It is not an unprimeable number, because it can be changed into a prime (28534825987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3439181 + ... + 3447467.

It is an arithmetic number, because the mean of its divisors is an integer number (2094551648).

Almost surely, 2^28534825988 is an apocalyptic number.

It is an amenable number.

28534825988 is a deficient number, since it is larger than the sum of its proper divisors (21734413564).

28534825988 is a wasteful number, since it uses less digits than its factorization.

28534825988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13931 (or 13929 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 62.

The spelling of 28534825988 in words is "twenty-eight billion, five hundred thirty-four million, eight hundred twenty-five thousand, nine hundred eighty-eight".