28438677 has 6 divisors (see below), whose sum is σ = 41078102. Its totient is φ = 18959112.

The previous prime is 28438667. The next prime is 28438679. The reversal of 28438677 is 77683482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 8242641 = 4494^2 + 2871^2 .

It is not a de Polignac number, because 28438677 - 2⁴ = 28438661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438679) 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 5 ways as a sum of consecutive naturals, for example, 1579918 + ... + 1579935.

Almost surely, 2^28438677 is an apocalyptic number.

It is an amenable number.

28438677 is a deficient number, since it is larger than the sum of its proper divisors (12639425).

28438677 is a wasteful number, since it uses less digits than its factorization.

28438677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159859 (or 3159856 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 28438677 is about 5332.7926080057. The cubic root of 28438677 is about 305.2364984661.

The spelling of 28438677 in words is "twenty-eight million, four hundred thirty-eight thousand, six hundred seventy-seven".