28606556 has 24 divisors (see below), whose sum is σ = 54794880. Its totient is φ = 12959600.

The previous prime is 28606553. The next prime is 28606573. The reversal of 28606556 is 65560682.

It is a happy number.

It is a super-2 number, since 2×28606556² = 1636670092362272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28606553) 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, 14891 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (2283120).

Almost surely, 2^28606556 is an apocalyptic number.

It is an amenable number.

28606556 is a deficient number, since it is larger than the sum of its proper divisors (26188324).

28606556 is a wasteful number, since it uses less digits than its factorization.

28606556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 28606556 is about 5348.5096989722. The cubic root of 28606556 is about 305.8359437857.

The spelling of 28606556 in words is "twenty-eight million, six hundred six thousand, five hundred fifty-six".