28253677 has 8 divisors (see below), whose sum is σ = 29964600. Its totient is φ = 26548224.

The previous prime is 28253653. The next prime is 28253689. The reversal of 28253677 is 77635282.

It can be written as a sum of positive squares in 4 ways, for example, as 6295081 + 21958596 = 2509^2 + 4686^2 .

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 28253677 - 2⁷ = 28253549 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 (28253377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14899 + ... + 16687.

It is an arithmetic number, because the mean of its divisors is an integer number (3745575).

Almost surely, 2^28253677 is an apocalyptic number.

It is an amenable number.

28253677 is a deficient number, since it is larger than the sum of its proper divisors (1710923).

28253677 is a wasteful number, since it uses less digits than its factorization.

28253677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its digits is 141120, while the sum is 40.

The square root of 28253677 is about 5315.4187981757. The cubic root of 28253677 is about 304.5731806426.

The spelling of 28253677 in words is "twenty-eight million, two hundred fifty-three thousand, six hundred seventy-seven".