28566201280 has 56 divisors (see below), whose sum is σ = 68683766112. Its totient is φ = 11315530752.

The previous prime is 28566201259. The next prime is 28566201283. The reversal of 28566201280 is 8210266582.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566201283) by changing a digit.

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, 400387 + ... + 466306.

Almost surely, 2^28566201280 is an apocalyptic number.

28566201280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28566201280 is an abundant number, since it is smaller than the sum of its proper divisors (40117564832).

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

28566201280 is a wasteful number, since it uses less digits than its factorization.

28566201280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866813 (or 866803 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 28566201280 in words is "twenty-eight billion, five hundred sixty-six million, two hundred one thousand, two hundred eighty".