405550406 has 8 divisors (see below), whose sum is σ = 611842464. Its totient is φ = 201602920.

The previous prime is 405550403. The next prime is 405550417. The reversal of 405550406 is 604055504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×405550406² = 328942263613529672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405550403) 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, 585710 + ... + 586401.

It is an arithmetic number, because the mean of its divisors is an integer number (76480308).

Almost surely, 2^405550406 is an apocalyptic number.

405550406 is a deficient number, since it is larger than the sum of its proper divisors (206292058).

405550406 is a wasteful number, since it uses less digits than its factorization.

405550406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172286.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 405550406 is about 20138.2821015100. The cubic root of 405550406 is about 740.1986355002.

The spelling of 405550406 in words is "four hundred five million, five hundred fifty thousand, four hundred six".