405812012 has 12 divisors (see below), whose sum is σ = 712442136. Its totient is φ = 202257120.

The previous prime is 405812009. The next prime is 405812021. The reversal of 405812012 is 210218504.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 160814 + ... + 163317.

It is an arithmetic number, because the mean of its divisors is an integer number (59370178).

Almost surely, 2^405812012 is an apocalyptic number.

It is an amenable number.

405812012 is a deficient number, since it is larger than the sum of its proper divisors (306630124).

405812012 is a wasteful number, since it uses less digits than its factorization.

405812012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324448 (or 324446 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 405812012 is about 20144.7762956058. The cubic root of 405812012 is about 740.3577598075.

The spelling of 405812012 in words is "four hundred five million, eight hundred twelve thousand, twelve".