405554845 has 8 divisors (see below), whose sum is σ = 486798264. Its totient is φ = 324355584.

The previous prime is 405554843. The next prime is 405554857. The reversal of 405554845 is 548455504.

It can be written as a sum of positive squares in 4 ways, for example, as 55041561 + 350513284 = 7419^2 + 18722^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 405554845 - 2¹ = 405554843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405554798 and 405554807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405554843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14577 + ... + 31993.

It is an arithmetic number, because the mean of its divisors is an integer number (60849783).

Almost surely, 2^405554845 is an apocalyptic number.

It is an amenable number.

405554845 is a deficient number, since it is larger than the sum of its proper divisors (81243419).

405554845 is a wasteful number, since it uses less digits than its factorization.

405554845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22079.

The product of its (nonzero) digits is 320000, while the sum is 40.

The square root of 405554845 is about 20138.3923141844. The cubic root of 405554845 is about 740.2013361343.

The spelling of 405554845 in words is "four hundred five million, five hundred fifty-four thousand, eight hundred forty-five".