23400443 has 16 divisors (see below), whose sum is σ = 26575872. Its totient is φ = 20412000.

The previous prime is 23400427. The next prime is 23400451. The reversal of 23400443 is 34400432.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23400443 - 2⁴ = 23400427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23400413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55373 + ... + 55793.

It is an arithmetic number, because the mean of its divisors is an integer number (1660992).

Almost surely, 2^23400443 is an apocalyptic number.

23400443 is a deficient number, since it is larger than the sum of its proper divisors (3175429).

23400443 is a wasteful number, since it uses less digits than its factorization.

23400443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

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

The square root of 23400443 is about 4837.4004382519. The cubic root of 23400443 is about 286.0276555649.

Adding to 23400443 its reverse (34400432), we get a palindrome (57800875).

The spelling of 23400443 in words is "twenty-three million, four hundred thousand, four hundred forty-three".