28556051 has 4 divisors (see below), whose sum is σ = 28917600. Its totient is φ = 28194504.

The previous prime is 28556027. The next prime is 28556081. The reversal of 28556051 is 15065582.

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

It is a cyclic number.

It is not a de Polignac number, because 28556051 - 2²² = 24361747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28555999 and 28556017.

It is not an unprimeable number, because it can be changed into a prime (28556081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180656 + ... + 180813.

It is an arithmetic number, because the mean of its divisors is an integer number (7229400).

Almost surely, 2^28556051 is an apocalyptic number.

28556051 is a deficient number, since it is larger than the sum of its proper divisors (361549).

28556051 is an equidigital number, since it uses as much as digits as its factorization.

28556051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361548.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 28556051 is about 5343.7862045557. The cubic root of 28556051 is about 305.6558528606.

The spelling of 28556051 in words is "twenty-eight million, five hundred fifty-six thousand, fifty-one".