405808468 has 12 divisors (see below), whose sum is σ = 764792980. Its totient is φ = 187296192.

The previous prime is 405808453. The next prime is 405808471. The reversal of 405808468 is 864808504.

It can be written as a sum of positive squares in 2 ways, for example, as 39162564 + 366645904 = 6258^2 + 19148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901953 + ... + 3902056.

Almost surely, 2^405808468 is an apocalyptic number.

It is an amenable number.

405808468 is a deficient number, since it is larger than the sum of its proper divisors (358984512).

405808468 is a wasteful number, since it uses less digits than its factorization.

405808468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7804026 (or 7804024 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The square root of 405808468 is about 20144.6883321634. The cubic root of 405808468 is about 740.3556045932.

The spelling of 405808468 in words is "four hundred five million, eight hundred eight thousand, four hundred sixty-eight".