405740044 has 12 divisors (see below), whose sum is σ = 734529600. Its totient is φ = 195874448.

The previous prime is 405740021. The next prime is 405740047. The reversal of 405740044 is 440047504.

It is a junction number, because it is equal to n+sod(n) for n = 405739994 and 405740021.

It is not an unprimeable number, because it can be changed into a prime (405740047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748764 + ... + 1748995.

It is an arithmetic number, because the mean of its divisors is an integer number (61210800).

Almost surely, 2^405740044 is an apocalyptic number.

It is an amenable number.

405740044 is a deficient number, since it is larger than the sum of its proper divisors (328789556).

405740044 is a wasteful number, since it uses less digits than its factorization.

405740044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497792 (or 3497790 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 405740044 is about 20142.9899468773. The cubic root of 405740044 is about 740.3139914158.

Adding to 405740044 its reverse (440047504), we get a palindrome (845787548).

The spelling of 405740044 in words is "four hundred five million, seven hundred forty thousand, forty-four".