28568313580 has 48 divisors (see below), whose sum is σ = 61447811040. Its totient is φ = 11153438208.

The previous prime is 28568313559. The next prime is 28568313581. The reversal of 28568313580 is 8531386582.

It is a happy number.

It is a super-2 number, since 2×28568313580² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28568313581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48264 + ... + 243856.

It is an arithmetic number, because the mean of its divisors is an integer number (1280162730).

Almost surely, 2^28568313580 is an apocalyptic number.

28568313580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28568313580 is an abundant number, since it is smaller than the sum of its proper divisors (32879497460).

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

28568313580 is a wasteful number, since it uses less digits than its factorization.

28568313580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195778 (or 195776 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 28568313580 in words is "twenty-eight billion, five hundred sixty-eight million, three hundred thirteen thousand, five hundred eighty".