405811928 has 16 divisors (see below), whose sum is σ = 767632680. Its totient is φ = 201109888.

The previous prime is 405811921. The next prime is 405811949. The reversal of 405811928 is 829118504.

It is a junction number, because it is equal to n+sod(n) for n = 405811891 and 405811900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405811921) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 223550 + ... + 225357.

Almost surely, 2^405811928 is an apocalyptic number.

It is an amenable number.

405811928 is a deficient number, since it is larger than the sum of its proper divisors (361820752).

405811928 is a wasteful number, since it uses less digits than its factorization.

405811928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449026 (or 449022 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 405811928 is about 20144.7742106979. The cubic root of 405811928 is about 740.3577087247.

The spelling of 405811928 in words is "four hundred five million, eight hundred eleven thousand, nine hundred twenty-eight".