28562020 has 24 divisors (see below), whose sum is σ = 60085368. Its totient is φ = 11404800.

The previous prime is 28561999. The next prime is 28562029. The reversal of 28562020 is 2026582.

It can be written as a sum of positive squares in 4 ways, for example, as 2286144 + 26275876 = 1512^2 + 5126^2 .

It is not an unprimeable number, because it can be changed into a prime (28562029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16810 + ... + 18430.

It is an arithmetic number, because the mean of its divisors is an integer number (2503557).

Almost surely, 2^28562020 is an apocalyptic number.

28562020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28562020 is an abundant number, since it is smaller than the sum of its proper divisors (31523348).

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

28562020 is a wasteful number, since it uses less digits than its factorization.

28562020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28562020 is about 5344.3446745134. The cubic root of 28562020 is about 305.6771482033.

The spelling of 28562020 in words is "twenty-eight million, five hundred sixty-two thousand, twenty".