28055505028 has 12 divisors (see below), whose sum is σ = 49099876560. Its totient is φ = 14026968872.

The previous prime is 28055504989. The next prime is 28055505031. The reversal of 28055505028 is 82050555082.

It is a happy number.

It is a super-2 number, since 2×28055505028² (a number of 22 digits) contains 22 as substring.

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, 111298 + ... + 261721.

It is an arithmetic number, because the mean of its divisors is an integer number (4091656380).

Almost surely, 2^28055505028 is an apocalyptic number.

It is an amenable number.

28055505028 is a deficient number, since it is larger than the sum of its proper divisors (21044371532).

28055505028 is a wasteful number, since it uses less digits than its factorization.

28055505028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391826 (or 391824 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 40.

The spelling of 28055505028 in words is "twenty-eight billion, fifty-five million, five hundred five thousand, twenty-eight".