28181066 has 16 divisors (see below), whose sum is σ = 45110400. Its totient is φ = 13164768.

The previous prime is 28181051. The next prime is 28181089. The reversal of 28181066 is 66018182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2306 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (2819400).

Almost surely, 2^28181066 is an apocalyptic number.

28181066 is a deficient number, since it is larger than the sum of its proper divisors (16929334).

28181066 is a wasteful number, since it uses less digits than its factorization.

28181066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 28181066 is about 5308.5841803630. The cubic root of 28181066 is about 304.3120425312.

The spelling of 28181066 in words is "twenty-eight million, one hundred eighty-one thousand, sixty-six".