28181276 has 12 divisors (see below), whose sum is σ = 49515480. Its totient is φ = 14034000.

The previous prime is 28181203. The next prime is 28181287. The reversal of 28181276 is 67218182.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13031 + ... + 15038.

It is an arithmetic number, because the mean of its divisors is an integer number (4126290).

Almost surely, 2^28181276 is an apocalyptic number.

It is an amenable number.

28181276 is a deficient number, since it is larger than the sum of its proper divisors (21334204).

28181276 is a wasteful number, since it uses less digits than its factorization.

28181276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28324 (or 28322 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 28181276 is about 5308.6039596112. The cubic root of 28181276 is about 304.3127984213.

The spelling of 28181276 in words is "twenty-eight million, one hundred eighty-one thousand, two hundred seventy-six".