28644125830 has 16 divisors (see below), whose sum is σ = 54273080880. Its totient is φ = 10854616032.

The previous prime is 28644125803. The next prime is 28644125837. The reversal of 28644125830 is 3852144682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28644125837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75379089 + ... + 75379468.

It is an arithmetic number, because the mean of its divisors is an integer number (3392067555).

Almost surely, 2^28644125830 is an apocalyptic number.

28644125830 is a deficient number, since it is larger than the sum of its proper divisors (25628955050).

28644125830 is a wasteful number, since it uses less digits than its factorization.

28644125830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150758583.

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 28644125830 in words is "twenty-eight billion, six hundred forty-four million, one hundred twenty-five thousand, eight hundred thirty".