28261814 has 16 divisors (see below), whose sum is σ = 48612096. Its totient is φ = 12071400.

The previous prime is 28261813. The next prime is 28261819. The reversal of 28261814 is 41816282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261811) 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, 1109 + ... + 7599.

It is an arithmetic number, because the mean of its divisors is an integer number (3038256).

Almost surely, 2^28261814 is an apocalyptic number.

28261814 is a deficient number, since it is larger than the sum of its proper divisors (20350282).

28261814 is a wasteful number, since it uses less digits than its factorization.

28261814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811.

The product of its digits is 6144, while the sum is 32.

The square root of 28261814 is about 5316.1841578335. The cubic root of 28261814 is about 304.6024166496.

The spelling of 28261814 in words is "twenty-eight million, two hundred sixty-one thousand, eight hundred fourteen".