405923845 has 8 divisors (see below), whose sum is σ = 487563264. Its totient is φ = 324435984.

The previous prime is 405923831. The next prime is 405923851. The reversal of 405923845 is 548329504.

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 405923845 - 2¹¹ = 405921797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405923798 and 405923807.

It is a congruent number.

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, 31909 + ... + 42778.

It is an arithmetic number, because the mean of its divisors is an integer number (60945408).

Almost surely, 2^405923845 is an apocalyptic number.

It is an amenable number.

405923845 is a deficient number, since it is larger than the sum of its proper divisors (81639419).

405923845 is a wasteful number, since it uses less digits than its factorization.

405923845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75779.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 405923845 is about 20147.5518363895. The cubic root of 405923845 is about 740.4257624150.

The spelling of 405923845 in words is "four hundred five million, nine hundred twenty-three thousand, eight hundred forty-five".