28057728396 has 24 divisors (see below), whose sum is σ = 65470903344. Its totient is φ = 9352166080.

The previous prime is 28057728343. The next prime is 28057728407. The reversal of 28057728396 is 69382775082.

It is a super-2 number, since 2×28057728396² (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 7 ways as a sum of consecutive naturals, for example, 376906 + ... + 445166.

It is an arithmetic number, because the mean of its divisors is an integer number (2727954306).

Almost surely, 2^28057728396 is an apocalyptic number.

It is an amenable number.

28057728396 is an abundant number, since it is smaller than the sum of its proper divisors (37413174948).

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

28057728396 is a wasteful number, since it uses less digits than its factorization.

28057728396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102521 (or 102519 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 28057728396 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, three hundred ninety-six".