28774085 has 4 divisors (see below), whose sum is σ = 34528908. Its totient is φ = 23019264.

The previous prime is 28774069. The next prime is 28774093. The reversal of 28774085 is 58047782.

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 13147876 + 15626209 = 3626^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 28774085 - 2⁴ = 28774069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2877404 + ... + 2877413.

It is an arithmetic number, because the mean of its divisors is an integer number (8632227).

Almost surely, 2^28774085 is an apocalyptic number.

It is an amenable number.

28774085 is a deficient number, since it is larger than the sum of its proper divisors (5754823).

28774085 is an equidigital number, since it uses as much as digits as its factorization.

28774085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754822.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28774085 is about 5364.1481150319. The cubic root of 28774085 is about 306.4318059739.

The spelling of 28774085 in words is "twenty-eight million, seven hundred seventy-four thousand, eighty-five".