28877 has 4 divisors (see below), whose sum is σ = 29376. Its totient is φ = 28380.

The previous prime is 28871. The next prime is 28879. The reversal of 28877 is 77882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28877 - 2⁶ = 28813 is a prime.

It is a super-2 number, since 2×28877² = 1667762258, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28877.

It is not an unprimeable number, because it can be changed into a prime (28871) 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, 149 + ... + 282.

It is an arithmetic number, because the mean of its divisors is an integer number (7344).

2²⁸⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

28877 is a deficient number, since it is larger than the sum of its proper divisors (499).

28877 is an equidigital number, since it uses as much as digits as its factorization.

28877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

The product of its digits is 6272, while the sum is 32.

The square root of 28877 is about 169.9323394766. The cubic root of 28877 is about 30.6796704985.

The spelling of 28877 in words is "twenty-eight thousand, eight hundred seventy-seven".