18230400 has 192 divisors, whose sum is σ = 67034400. Its totient is φ = 4838400.

The previous prime is 18230393. The next prime is 18230411. The reversal of 18230400 is 403281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86295 + ... + 86505.

Almost surely, 2^18230400 is an apocalyptic number.

18230400 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 18230400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33517200).

18230400 is an abundant number, since it is smaller than the sum of its proper divisors (48804000).

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

18230400 is a wasteful number, since it uses less digits than its factorization.

18230400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18230400 is about 4269.7072499177. The cubic root of 18230400 is about 263.1875851413.

Adding to 18230400 its reverse (403281), we get a palindrome (18633681).

The spelling of 18230400 in words is "eighteen million, two hundred thirty thousand, four hundred".