28085377 has 4 divisors (see below), whose sum is σ = 29737476. Its totient is φ = 26433280.

The previous prime is 28085371. The next prime is 28085381. The reversal of 28085377 is 77358082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15968016 + 12117361 = 3996^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 28085377 - 2¹¹ = 28083329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28085371) 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, 826024 + ... + 826057.

It is an arithmetic number, because the mean of its divisors is an integer number (7434369).

Almost surely, 2^28085377 is an apocalyptic number.

It is an amenable number.

28085377 is a deficient number, since it is larger than the sum of its proper divisors (1652099).

28085377 is a wasteful number, since it uses less digits than its factorization.

28085377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652098.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28085377 is about 5299.5638499786. The cubic root of 28085377 is about 303.9672207558.

The spelling of 28085377 in words is "twenty-eight million, eighty-five thousand, three hundred seventy-seven".