405420406 has 16 divisors (see below), whose sum is σ = 629576640. Its totient is φ = 195572160.

The previous prime is 405420397. The next prime is 405420409. The reversal of 405420406 is 604024504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405420409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150451 + ... + 153121.

It is an arithmetic number, because the mean of its divisors is an integer number (39348540).

Almost surely, 2^405420406 is an apocalyptic number.

405420406 is a deficient number, since it is larger than the sum of its proper divisors (224156234).

405420406 is a wasteful number, since it uses less digits than its factorization.

405420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 405420406 is about 20135.0541593510. The cubic root of 405420406 is about 740.1195363263.

The spelling of 405420406 in words is "four hundred five million, four hundred twenty thousand, four hundred six".