28556026 has 4 divisors (see below), whose sum is σ = 42834042. Its totient is φ = 14278012.

The previous prime is 28556023. The next prime is 28556027. The reversal of 28556026 is 62065582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24552025 + 4004001 = 4955^2 + 2001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28555982 and 28556000.

It is not an unprimeable number, because it can be changed into a prime (28556023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139005 + ... + 7139008.

Almost surely, 2^28556026 is an apocalyptic number.

28556026 is a deficient number, since it is larger than the sum of its proper divisors (14278016).

28556026 is a wasteful number, since it uses less digits than its factorization.

28556026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278015.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 28556026 is about 5343.7838653898. The cubic root of 28556026 is about 305.6557636629.

The spelling of 28556026 in words is "twenty-eight million, five hundred fifty-six thousand, twenty-six".