23400450 has 72 divisors (see below), whose sum is σ = 63472500. Its totient is φ = 6180480.

The previous prime is 23400427. The next prime is 23400451. The reversal of 23400450 is 5400432.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6335289 + 17065161 = 2517^2 + 4131^2 .

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

It is not an unprimeable number, because it can be changed into a prime (23400451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66876 + ... + 67224.

Almost surely, 2^23400450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23400450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31736250).

23400450 is an abundant number, since it is smaller than the sum of its proper divisors (40072050).

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

23400450 is a wasteful number, since it uses less digits than its factorization.

23400450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 23400450 is about 4837.4011617810. The cubic root of 23400450 is about 286.0276840856.

Subtracting from 23400450 its sum of digits (18), we obtain a palindrome (23400432).

Adding to 23400450 its reverse (5400432), we get a palindrome (28800882).

The spelling of 23400450 in words is "twenty-three million, four hundred thousand, four hundred fifty".