405855244 has 24 divisors (see below), whose sum is σ = 715871520. Its totient is φ = 201327744.

The previous prime is 405855227. The next prime is 405855251. The reversal of 405855244 is 442558504.

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 7 ways as a sum of consecutive naturals, for example, 333982 + ... + 335194.

It is an arithmetic number, because the mean of its divisors is an integer number (29827980).

Almost surely, 2^405855244 is an apocalyptic number.

It is an amenable number.

405855244 is a deficient number, since it is larger than the sum of its proper divisors (310016276).

405855244 is a wasteful number, since it uses less digits than its factorization.

405855244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 37.

The square root of 405855244 is about 20145.8492995456. The cubic root of 405855244 is about 740.3840494927.

The spelling of 405855244 in words is "four hundred five million, eight hundred fifty-five thousand, two hundred forty-four".