23440045 has 16 divisors (see below), whose sum is σ = 28868400. Its totient is φ = 18264064.

The previous prime is 23440037. The next prime is 23440063. The reversal of 23440045 is 54004432.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3912484 + 19527561 = 1978^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 23440045 - 2³ = 23440037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23439998 and 23440025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51981 + ... + 52429.

It is an arithmetic number, because the mean of its divisors is an integer number (1804275).

Almost surely, 2^23440045 is an apocalyptic number.

It is an amenable number.

23440045 is a deficient number, since it is larger than the sum of its proper divisors (5428355).

23440045 is a wasteful number, since it uses less digits than its factorization.

23440045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 23440045 is about 4841.4920220940. The cubic root of 23440045 is about 286.1889186554.

Adding to 23440045 its reverse (54004432), we get a palindrome (77444477).

The spelling of 23440045 in words is "twenty-three million, four hundred forty thousand, forty-five".