28126885 has 8 divisors (see below), whose sum is σ = 33782040. Its totient is φ = 22481664.

The previous prime is 28126883. The next prime is 28126913. The reversal of 28126885 is 58862182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58081 + 28068804 = 241^2 + 5298^2 .

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 28126885 - 2¹ = 28126883 is a prime.

It is a super-2 number, since 2×28126885² = 1582243319606450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28126883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7161 + ... + 10369.

It is an arithmetic number, because the mean of its divisors is an integer number (4222755).

Almost surely, 2^28126885 is an apocalyptic number.

It is an amenable number.

28126885 is a deficient number, since it is larger than the sum of its proper divisors (5655155).

28126885 is a wasteful number, since it uses less digits than its factorization.

28126885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967.

The product of its digits is 61440, while the sum is 40.

The square root of 28126885 is about 5303.4785754258. The cubic root of 28126885 is about 304.1168936718.

The spelling of 28126885 in words is "twenty-eight million, one hundred twenty-six thousand, eight hundred eighty-five".