28525188534 has 16 divisors (see below), whose sum is σ = 57604265472. Its totient is φ = 9416081448.

The previous prime is 28525188533. The next prime is 28525188553. The reversal of 28525188534 is 43588152582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28525188533) 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, 23078014 + ... + 23079249.

It is an arithmetic number, because the mean of its divisors is an integer number (3600266592).

Almost surely, 2^28525188534 is an apocalyptic number.

28525188534 is an abundant number, since it is smaller than the sum of its proper divisors (29079076938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28525188534 is a wasteful number, since it uses less digits than its factorization.

28525188534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46157371.

The product of its digits is 3072000, while the sum is 51.

The spelling of 28525188534 in words is "twenty-eight billion, five hundred twenty-five million, one hundred eighty-eight thousand, five hundred thirty-four".