28985097825 has 36 divisors (see below), whose sum is σ = 51925195920. Its totient is φ = 15455841120.

The previous prime is 28985097811. The next prime is 28985097829. The reversal of 28985097825 is 52879058982.

It is not a de Polignac number, because 28985097825 - 2⁵ = 28985097793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28985097829) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1819746 + ... + 1835604.

Almost surely, 2^28985097825 is an apocalyptic number.

28985097825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28985097825 is a deficient number, since it is larger than the sum of its proper divisors (22940098095).

28985097825 is a wasteful number, since it uses less digits than its factorization.

28985097825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23998 (or 23990 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 63.

The spelling of 28985097825 in words is "twenty-eight billion, nine hundred eighty-five million, ninety-seven thousand, eight hundred twenty-five".