23440400 has 30 divisors (see below), whose sum is σ = 56316522. Its totient is φ = 9376000.

The previous prime is 23440393. The next prime is 23440411. The reversal of 23440400 is 404432.

It can be written as a sum of positive squares in 3 ways, for example, as 1048576 + 22391824 = 1024^2 + 4732^2 .

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28901 + ... + 29700.

Almost surely, 2^23440400 is an apocalyptic number.

23440400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23440400 is an abundant number, since it is smaller than the sum of its proper divisors (32876122).

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

23440400 is a wasteful number, since it uses less digits than its factorization.

23440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58619 (or 58608 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 23440400 is about 4841.5286842071. The cubic root of 23440400 is about 286.1903634273.

Adding to 23440400 its reverse (404432), we get a palindrome (23844832).

The spelling of 23440400 in words is "twenty-three million, four hundred forty thousand, four hundred".