28556277 has 16 divisors (see below), whose sum is σ = 40487040. Its totient is φ = 17841152.

The previous prime is 28556261. The next prime is 28556279. The reversal of 28556277 is 77265582.

It is a cyclic number.

It is not a de Polignac number, because 28556277 - 2⁴ = 28556261 is a prime.

It is a super-2 number, since 2×28556277² = 1630921912201458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556279) 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, 12349 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (2530440).

Almost surely, 2^28556277 is an apocalyptic number.

It is an amenable number.

28556277 is a deficient number, since it is larger than the sum of its proper divisors (11930763).

28556277 is a wasteful number, since it uses less digits than its factorization.

28556277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 235200, while the sum is 42.

The square root of 28556277 is about 5343.8073505694. The cubic root of 28556277 is about 305.6566592050.

The spelling of 28556277 in words is "twenty-eight million, five hundred fifty-six thousand, two hundred seventy-seven".