28633777 has 4 divisors (see below), whose sum is σ = 28826100. Its totient is φ = 28441456.

The previous prime is 28633771. The next prime is 28633793. The reversal of 28633777 is 77733682.

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 3272481 + 25361296 = 1809^2 + 5036^2 .

It is a cyclic number.

It is not a de Polignac number, because 28633777 - 2³ = 28633769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28633771) 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, 95938 + ... + 96235.

It is an arithmetic number, because the mean of its divisors is an integer number (7206525).

Almost surely, 2^28633777 is an apocalyptic number.

It is an amenable number.

28633777 is a deficient number, since it is larger than the sum of its proper divisors (192323).

28633777 is a wasteful number, since it uses less digits than its factorization.

28633777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192322.

The product of its digits is 296352, while the sum is 43.

The square root of 28633777 is about 5351.0538214449. The cubic root of 28633777 is about 305.9329206346.

The spelling of 28633777 in words is "twenty-eight million, six hundred thirty-three thousand, seven hundred seventy-seven".