28478269852 has 12 divisors (see below), whose sum is σ = 52459970920. Its totient is φ = 13489706736.

The previous prime is 28478269843. The next prime is 28478269889. The reversal of 28478269852 is 25896287482.

It is a super-2 number, since 2×28478269852² (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, 187356963 + ... + 187357114.

Almost surely, 2^28478269852 is an apocalyptic number.

It is an amenable number.

28478269852 is a deficient number, since it is larger than the sum of its proper divisors (23981701068).

28478269852 is a wasteful number, since it uses less digits than its factorization.

28478269852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374714100 (or 374714098 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 61.

The spelling of 28478269852 in words is "twenty-eight billion, four hundred seventy-eight million, two hundred sixty-nine thousand, eight hundred fifty-two".