28164877 has 4 divisors (see below), whose sum is σ = 30331420. Its totient is φ = 25998336.

The previous prime is 28164863. The next prime is 28164883. The reversal of 28164877 is 77846182.

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 9554281 + 18610596 = 3091^2 + 4314^2 .

It is not a de Polignac number, because 28164877 - 2⁷ = 28164749 is a prime.

It is a super-3 number, since 3×28164877³ (a number of 23 digits) contains 333 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 (28164817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083252 + ... + 1083277.

It is an arithmetic number, because the mean of its divisors is an integer number (7582855).

Almost surely, 2^28164877 is an apocalyptic number.

It is an amenable number.

28164877 is a deficient number, since it is larger than the sum of its proper divisors (2166543).

28164877 is a wasteful number, since it uses less digits than its factorization.

28164877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166542.

The product of its digits is 150528, while the sum is 43.

The square root of 28164877 is about 5307.0591668079. The cubic root of 28164877 is about 304.2537592932.

The spelling of 28164877 in words is "twenty-eight million, one hundred sixty-four thousand, eight hundred seventy-seven".