28133782 has 16 divisors (see below), whose sum is σ = 43374672. Its totient is φ = 13678560.

The previous prime is 28133731. The next prime is 28133789. The reversal of 28133782 is 28733182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23232 + ... + 24412.

It is an arithmetic number, because the mean of its divisors is an integer number (2710917).

Almost surely, 2^28133782 is an apocalyptic number.

28133782 is a deficient number, since it is larger than the sum of its proper divisors (15240890).

28133782 is a wasteful number, since it uses less digits than its factorization.

28133782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503.

The product of its digits is 16128, while the sum is 34.

The square root of 28133782 is about 5304.1287691760. The cubic root of 28133782 is about 304.1417491650.

The spelling of 28133782 in words is "twenty-eight million, one hundred thirty-three thousand, seven hundred eighty-two".