28357567428 has 24 divisors (see below), whose sum is σ = 66282348832. Its totient is φ = 9436137984.

The previous prime is 28357567411. The next prime is 28357567439. The reversal of 28357567428 is 82476575382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040850 + ... + 2054697.

Almost surely, 2^28357567428 is an apocalyptic number.

It is an amenable number.

28357567428 is an abundant number, since it is smaller than the sum of its proper divisors (37924781404).

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

28357567428 is a wasteful number, since it uses less digits than its factorization.

28357567428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096131 (or 4096129 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 57.

The spelling of 28357567428 in words is "twenty-eight billion, three hundred fifty-seven million, five hundred sixty-seven thousand, four hundred twenty-eight".