28877173 has 4 divisors (see below), whose sum is σ = 31098508. Its totient is φ = 26655840.

The previous prime is 28877159. The next prime is 28877179. The reversal of 28877173 is 37177882.

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 10712529 + 18164644 = 3273^2 + 4262^2 .

It is a cyclic number.

It is not a de Polignac number, because 28877173 - 2¹⁷ = 28746101 is a prime.

It is a super-2 number, since 2×28877173² = 1667782240943858, 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 (28877179) 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, 1110648 + ... + 1110673.

It is an arithmetic number, because the mean of its divisors is an integer number (7774627).

Almost surely, 2^28877173 is an apocalyptic number.

It is an amenable number.

28877173 is a deficient number, since it is larger than the sum of its proper divisors (2221335).

28877173 is a wasteful number, since it uses less digits than its factorization.

28877173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221334.

The product of its digits is 131712, while the sum is 43.

The square root of 28877173 is about 5373.7485054662. The cubic root of 28877173 is about 306.7973176498.

The spelling of 28877173 in words is "twenty-eight million, eight hundred seventy-seven thousand, one hundred seventy-three".