28083891952 has 80 divisors (see below), whose sum is σ = 56503383552. Its totient is φ = 13514019840.

The previous prime is 28083891949. The next prime is 28083891961. The reversal of 28083891952 is 25919838082.

It is a happy number.

It is a super-2 number, since 2×28083891952² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28083891893 and 28083891902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15041323 + ... + 15043189.

Almost surely, 2^28083891952 is an apocalyptic number.

It is an amenable number.

28083891952 is an abundant number, since it is smaller than the sum of its proper divisors (28419491600).

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

28083891952 is a wasteful number, since it uses less digits than its factorization.

28083891952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 28083891952 in words is "twenty-eight billion, eighty-three million, eight hundred ninety-one thousand, nine hundred fifty-two".