43400445 has 32 divisors (see below), whose sum is σ = 77811840. Its totient is φ = 20471040.

The previous prime is 43400429. The next prime is 43400447. The reversal of 43400445 is 54400434.

It is not a de Polignac number, because 43400445 - 2⁴ = 43400429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43400447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2551 + ... + 9659.

It is an arithmetic number, because the mean of its divisors is an integer number (2431620).

Almost surely, 2^43400445 is an apocalyptic number.

It is an amenable number.

43400445 is a deficient number, since it is larger than the sum of its proper divisors (34411395).

43400445 is a wasteful number, since it uses less digits than its factorization.

43400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7165.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 43400445 is about 6587.9014109199. The cubic root of 43400445 is about 351.4239809651.

Adding to 43400445 its reverse (54400434), we get a palindrome (97800879).

The spelling of 43400445 in words is "forty-three million, four hundred thousand, four hundred forty-five".