23281400 has 48 divisors (see below), whose sum is σ = 55074600. Its totient is φ = 9150080.

The previous prime is 23281387. The next prime is 23281439. The reversal of 23281400 is 418232.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10814 + ... + 12786.

Almost surely, 2^23281400 is an apocalyptic number.

23281400 is a gapful number since it is divisible by the number (20) 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 23281400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27537300).

23281400 is an abundant number, since it is smaller than the sum of its proper divisors (31793200).

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

23281400 is a wasteful number, since it uses less digits than its factorization.

23281400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 23281400 is about 4825.0803102125. The cubic root of 23281400 is about 285.5418030379.

Adding to 23281400 its reverse (418232), we get a palindrome (23699632).

The spelling of 23281400 in words is "twenty-three million, two hundred eighty-one thousand, four hundred".