28569580 has 24 divisors (see below), whose sum is σ = 64611792. Its totient is φ = 10548672.

The previous prime is 28569577. The next prime is 28569581. The reversal of 28569580 is 8596582.

It is not an unprimeable number, because it can be changed into a prime (28569581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54682 + ... + 55201.

It is an arithmetic number, because the mean of its divisors is an integer number (2692158).

Almost surely, 2^28569580 is an apocalyptic number.

28569580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28569580 is an abundant number, since it is smaller than the sum of its proper divisors (36042212).

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

28569580 is a wasteful number, since it uses less digits than its factorization.

28569580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109905 (or 109903 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 28569580 is about 5345.0519174279. The cubic root of 28569580 is about 305.7041154297.

The spelling of 28569580 in words is "twenty-eight million, five hundred sixty-nine thousand, five hundred eighty".