18800380 has 12 divisors (see below), whose sum is σ = 39480840. Its totient is φ = 7520144.

The previous prime is 18800377. The next prime is 18800387. The reversal of 18800380 is 8300881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469990 + ... + 470029.

It is an arithmetic number, because the mean of its divisors is an integer number (3290070).

Almost surely, 2^18800380 is an apocalyptic number.

18800380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18800380 is an abundant number, since it is smaller than the sum of its proper divisors (20680460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18800380 is a wasteful number, since it uses less digits than its factorization.

18800380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940028 (or 940026 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18800380 is about 4335.9404977467. The cubic root of 18800380 is about 265.9023705636.

The spelling of 18800380 in words is "eighteen million, eight hundred thousand, three hundred eighty".