43790945 has 16 divisors (see below), whose sum is σ = 57628800. Its totient is φ = 31680000.

The previous prime is 43790917. The next prime is 43790987. The reversal of 43790945 is 54909734.

It is not a de Polignac number, because 43790945 - 2¹⁸ = 43528801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8945 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (3601800).

Almost surely, 2^43790945 is an apocalyptic number.

It is an amenable number.

43790945 is a deficient number, since it is larger than the sum of its proper divisors (13837855).

43790945 is a wasteful number, since it uses less digits than its factorization.

43790945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 43790945 is about 6617.4727048927. The cubic root of 43790945 is about 352.4748267656.

The spelling of 43790945 in words is "forty-three million, seven hundred ninety thousand, nine hundred forty-five".