18280772 has 12 divisors (see below), whose sum is σ = 32039616. Its totient is φ = 9126600.

The previous prime is 18280771. The next prime is 18280861. The reversal of 18280772 is 27708281.

It is not an unprimeable number, because it can be changed into a prime (18280771) by changing a digit.

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, 104 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (2669968).

Almost surely, 2^18280772 is an apocalyptic number.

It is an amenable number.

18280772 is a deficient number, since it is larger than the sum of its proper divisors (13758844).

18280772 is a wasteful number, since it uses less digits than its factorization.

18280772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6898 (or 6896 counting only the distinct ones).

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

The square root of 18280772 is about 4275.6019459253. The cubic root of 18280772 is about 263.4297647506.

The spelling of 18280772 in words is "eighteen million, two hundred eighty thousand, seven hundred seventy-two".