405538845 has 8 divisors (see below), whose sum is σ = 648862176. Its totient is φ = 216287376.

The previous prime is 405538843. The next prime is 405538849. The reversal of 405538845 is 548835504.

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

It is not a de Polignac number, because 405538845 - 2¹ = 405538843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405538797 and 405538806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405538843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13517947 + ... + 13517976.

It is an arithmetic number, because the mean of its divisors is an integer number (81107772).

Almost surely, 2^405538845 is an apocalyptic number.

It is an amenable number.

405538845 is a deficient number, since it is larger than the sum of its proper divisors (243323331).

405538845 is a wasteful number, since it uses less digits than its factorization.

405538845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27035931.

The product of its (nonzero) digits is 384000, while the sum is 42.

The square root of 405538845 is about 20137.9950590917. The cubic root of 405538845 is about 740.1916018346.

The spelling of 405538845 in words is "four hundred five million, five hundred thirty-eight thousand, eight hundred forty-five".