28055786 has 12 divisors (see below), whose sum is σ = 46257666. Its totient is φ = 12752520.

The previous prime is 28055779. The next prime is 28055801. The reversal of 28055786 is 68755082.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 755161 = 5225^2 + 869^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57725 + ... + 58208.

Almost surely, 2^28055786 is an apocalyptic number.

28055786 is a deficient number, since it is larger than the sum of its proper divisors (18201880).

28055786 is a wasteful number, since it uses less digits than its factorization.

28055786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115957 (or 115946 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28055786 is about 5296.7712806954. The cubic root of 28055786 is about 303.8604290632.

The spelling of 28055786 in words is "twenty-eight million, fifty-five thousand, seven hundred eighty-six".