28131066 has 24 divisors (see below), whose sum is σ = 61049664. Its totient is φ = 9361800.

The previous prime is 28131041. The next prime is 28131079. The reversal of 28131066 is 66013182.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 18175 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (2543736).

Almost surely, 2^28131066 is an apocalyptic number.

28131066 is an abundant number, since it is smaller than the sum of its proper divisors (32918598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28131066 is a wasteful number, since it uses less digits than its factorization.

28131066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28131066 is about 5303.8727360298. The cubic root of 28131066 is about 304.1319616958.

The spelling of 28131066 in words is "twenty-eight million, one hundred thirty-one thousand, sixty-six".