28357543660 has 24 divisors (see below), whose sum is σ = 59573349360. Its totient is φ = 11338730304.

The previous prime is 28357543649. The next prime is 28357543691. The reversal of 28357543660 is 6634575382.

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, 213439 + ... + 319798.

It is an arithmetic number, because the mean of its divisors is an integer number (2482222890).

Almost surely, 2^28357543660 is an apocalyptic number.

28357543660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28357543660 is an abundant number, since it is smaller than the sum of its proper divisors (31215805700).

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

28357543660 is a wasteful number, since it uses less digits than its factorization.

28357543660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535905 (or 535903 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 28357543660 in words is "twenty-eight billion, three hundred fifty-seven million, five hundred forty-three thousand, six hundred sixty".