28084877 has 8 divisors (see below), whose sum is σ = 28841400. Its totient is φ = 27331840.

The previous prime is 28084873. The next prime is 28084879. The reversal of 28084877 is 77848082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1190281 + 26894596 = 1091^2 + 5186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28084877 - 2² = 28084873 is a prime.

It is a super-2 number, since 2×28084877² = 1577520632210258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26249 + ... + 27297.

It is an arithmetic number, because the mean of its divisors is an integer number (3605175).

Almost surely, 2^28084877 is an apocalyptic number.

It is an amenable number.

28084877 is a deficient number, since it is larger than the sum of its proper divisors (756523).

28084877 is a wasteful number, since it uses less digits than its factorization.

28084877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 28084877 is about 5299.5166760753. The cubic root of 28084877 is about 303.9654169166.

The spelling of 28084877 in words is "twenty-eight million, eighty-four thousand, eight hundred seventy-seven".