28068577 has 4 divisors (see below), whose sum is σ = 28180656. Its totient is φ = 27956500.

The previous prime is 28068563. The next prime is 28068583. The reversal of 28068577 is 77586082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28068577 - 2¹⁵ = 28035809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28068587) 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, 55663 + ... + 56164.

It is an arithmetic number, because the mean of its divisors is an integer number (7045164).

Almost surely, 2^28068577 is an apocalyptic number.

It is an amenable number.

28068577 is a deficient number, since it is larger than the sum of its proper divisors (112079).

28068577 is a wasteful number, since it uses less digits than its factorization.

28068577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112078.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28068577 is about 5297.9785767781. The cubic root of 28068577 is about 303.9066000293.

The spelling of 28068577 in words is "twenty-eight million, sixty-eight thousand, five hundred seventy-seven".