28191533744 has 40 divisors (see below), whose sum is σ = 61039999440. Its totient is φ = 12501785600.

The previous prime is 28191533717. The next prime is 28191533753. The reversal of 28191533744 is 44733519182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946189 + ... + 1960620.

It is an arithmetic number, because the mean of its divisors is an integer number (1525999986).

Almost surely, 2^28191533744 is an apocalyptic number.

It is an amenable number.

28191533744 is an abundant number, since it is smaller than the sum of its proper divisors (32848465696).

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

28191533744 is a wasteful number, since it uses less digits than its factorization.

28191533744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906869 (or 3906863 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 28191533744 in words is "twenty-eight billion, one hundred ninety-one million, five hundred thirty-three thousand, seven hundred forty-four".