28055885125 has 16 divisors (see below), whose sum is σ = 35073484992. Its totient is φ = 22406413200.

The previous prime is 28055885083. The next prime is 28055885129. The reversal of 28055885125 is 52158855082.

It is a happy number.

It is not a de Polignac number, because 28055885125 - 2¹¹ = 28055883077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055885129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117807 + ... + 264556.

It is an arithmetic number, because the mean of its divisors is an integer number (2192092812).

Almost surely, 2^28055885125 is an apocalyptic number.

28055885125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28055885125 is a deficient number, since it is larger than the sum of its proper divisors (7017599867).

28055885125 is an equidigital number, since it uses as much as digits as its factorization.

28055885125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382965 (or 382955 counting only the distinct ones).

The product of its (nonzero) digits is 1280000, while the sum is 49.

The spelling of 28055885125 in words is "twenty-eight billion, fifty-five million, eight hundred eighty-five thousand, one hundred twenty-five".