23440030400 has 84 divisors (see below), whose sum is σ = 58538245128. Its totient is φ = 9236029440.

The previous prime is 23440030379. The next prime is 23440030421. The reversal of 23440030400 is 403004432.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23440030379) and next prime (23440030421).

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

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, 2129 + ... + 216528.

Almost surely, 2^23440030400 is an apocalyptic number.

23440030400 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 23440030400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29269122564).

23440030400 is an abundant number, since it is smaller than the sum of its proper divisors (35098214728).

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

23440030400 is a wasteful number, since it uses less digits than its factorization.

23440030400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218746 (or 218731 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 23440030400 its reverse (403004432), we get a palindrome (23843034832).

The spelling of 23440030400 in words is "twenty-three billion, four hundred forty million, thirty thousand, four hundred".