28556842 has 4 divisors (see below), whose sum is σ = 42835266. Its totient is φ = 14278420.

The previous prime is 28556831. The next prime is 28556873. The reversal of 28556842 is 24865582.

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., 26946481 + 1610361 = 5191^2 + 1269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28556795 and 28556804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139209 + ... + 7139212.

Almost surely, 2^28556842 is an apocalyptic number.

28556842 is a deficient number, since it is larger than the sum of its proper divisors (14278424).

28556842 is a wasteful number, since it uses less digits than its factorization.

28556842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278423.

The product of its digits is 153600, while the sum is 40.

The square root of 28556842 is about 5343.8602152377. The cubic root of 28556842 is about 305.6586750476.

The spelling of 28556842 in words is "twenty-eight million, five hundred fifty-six thousand, eight hundred forty-two".