18764728 has 16 divisors (see below), whose sum is σ = 35342280. Its totient is φ = 9340128.

The previous prime is 18764699. The next prime is 18764729. The reversal of 18764728 is 82746781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18764729) 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 3 ways as a sum of consecutive naturals, for example, 3351 + ... + 6982.

Almost surely, 2^18764728 is an apocalyptic number.

It is an amenable number.

18764728 is a deficient number, since it is larger than the sum of its proper divisors (16577552).

18764728 is a wasteful number, since it uses less digits than its factorization.

18764728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10566 (or 10562 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 18764728 is about 4331.8273280453. The cubic root of 18764728 is about 265.7341833593.

The spelling of 18764728 in words is "eighteen million, seven hundred sixty-four thousand, seven hundred twenty-eight".