28021133814 has 32 divisors (see below), whose sum is σ = 57415254624. Its totient is φ = 9113495040.

The previous prime is 28021133783. The next prime is 28021133821. The reversal of 28021133814 is 41833112082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185859 + ... + 300974.

It is an arithmetic number, because the mean of its divisors is an integer number (1794226707).

Almost surely, 2^28021133814 is an apocalyptic number.

28021133814 is an abundant number, since it is smaller than the sum of its proper divisors (29394120810).

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

28021133814 is a wasteful number, since it uses less digits than its factorization.

28021133814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487072.

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 28021133814 its reverse (41833112082), we get a palindrome (69854245896).

The spelling of 28021133814 in words is "twenty-eight billion, twenty-one million, one hundred thirty-three thousand, eight hundred fourteen".