405293805 has 24 divisors (see below), whose sum is σ = 802868352. Its totient is φ = 185277024.

The previous prime is 405293789. The next prime is 405293827. The reversal of 405293805 is 508392504.

It is not a de Polignac number, because 405293805 - 2⁴ = 405293789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405293805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 643009 + ... + 643638.

It is an arithmetic number, because the mean of its divisors is an integer number (33452848).

Almost surely, 2^405293805 is an apocalyptic number.

405293805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405293805 is a deficient number, since it is larger than the sum of its proper divisors (397574547).

405293805 is a wasteful number, since it uses less digits than its factorization.

405293805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286665 (or 1286662 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 405293805 is about 20131.9101180191. The cubic root of 405293805 is about 740.0424890383.

The spelling of 405293805 in words is "four hundred five million, two hundred ninety-three thousand, eight hundred five".