28304660884 has 12 divisors (see below), whose sum is σ = 52446871764. Its totient is φ = 13319840384.

The previous prime is 28304660851. The next prime is 28304660927. The reversal of 28304660884 is 48806640382.

It can be written as a sum of positive squares in 2 ways, for example, as 20917258384 + 7387402500 = 144628^2 + 85950^2 .

It is a super-2 number, since 2×28304660884² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208122439 + ... + 208122574.

It is an arithmetic number, because the mean of its divisors is an integer number (4370572647).

Almost surely, 2^28304660884 is an apocalyptic number.

It is an amenable number.

28304660884 is a deficient number, since it is larger than the sum of its proper divisors (24142210880).

28304660884 is a wasteful number, since it uses less digits than its factorization.

28304660884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416245034 (or 416245032 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 28304660884 in words is "twenty-eight billion, three hundred four million, six hundred sixty thousand, eight hundred eighty-four".