18440704 has 20 divisors (see below), whose sum is σ = 36846414. Its totient is φ = 9220096.

The previous prime is 18440677. The next prime is 18440707. The reversal of 18440704 is 40704481.

It can be written as a sum of positive squares in only one way, i.e., 15618304 + 2822400 = 3952^2 + 1680^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17497 + ... + 18520.

Almost surely, 2^18440704 is an apocalyptic number.

It is an amenable number.

18440704 is a deficient number, since it is larger than the sum of its proper divisors (18405710).

18440704 is an frugal number, since it uses more digits than its factorization.

18440704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36035 (or 36019 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 18440704 is about 4294.2640813066. The cubic root of 18440704 is about 264.1957531929.

The spelling of 18440704 in words is "eighteen million, four hundred forty thousand, seven hundred four".