28018772 has 12 divisors (see below), whose sum is σ = 49654080. Its totient is φ = 13831896.

The previous prime is 28018763. The next prime is 28018789. The reversal of 28018772 is 27781082.

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, 44018 + ... + 44649.

It is an arithmetic number, because the mean of its divisors is an integer number (4137840).

Almost surely, 2^28018772 is an apocalyptic number.

It is an amenable number.

28018772 is a deficient number, since it is larger than the sum of its proper divisors (21635308).

28018772 is a wasteful number, since it uses less digits than its factorization.

28018772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88750 (or 88748 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 28018772 is about 5293.2761122012. The cubic root of 28018772 is about 303.7267425615.

The spelling of 28018772 in words is "twenty-eight million, eighteen thousand, seven hundred seventy-two".