23405144 has 24 divisors (see below), whose sum is σ = 51050340. Its totient is φ = 10030608.

The previous prime is 23405143. The next prime is 23405147. The reversal of 23405144 is 44150432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29462 + ... + 30245.

Almost surely, 2^23405144 is an apocalyptic number.

It is an amenable number.

23405144 is an abundant number, since it is smaller than the sum of its proper divisors (27645196).

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

23405144 is a wasteful number, since it uses less digits than its factorization.

23405144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59727 (or 59716 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 23405144 is about 4837.8863153241. The cubic root of 23405144 is about 286.0468079940.

Adding to 23405144 its reverse (44150432), we get a palindrome (67555576).

The spelling of 23405144 in words is "twenty-three million, four hundred five thousand, one hundred forty-four".