18800000 has 96 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 7360000.

The previous prime is 18799997. The next prime is 18800003. The reversal of 18800000 is 881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18799997) and next prime (18800003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399977 + ... + 400023.

It is an arithmetic number, because the mean of its divisors is an integer number (498015).

Almost surely, 2^18800000 is an apocalyptic number.

18800000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904720).

18800000 is an abundant number, since it is smaller than the sum of its proper divisors (29009440).

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

18800000 is an frugal number, since it uses more digits than its factorization.

18800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 18800000 is about 4335.8966777358. The cubic root of 18800000 is about 265.9005790469.

Adding to 18800000 its reverse (881), we get a palindrome (18800881).

The spelling of 18800000 in words is "eighteen million, eight hundred thousand".