405442445 has 8 divisors (see below), whose sum is σ = 496882944. Its totient is φ = 317452624.

The previous prime is 405442441. The next prime is 405442487. The reversal of 405442445 is 544244504.

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 405442445 - 2² = 405442441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405442441) 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, 862409 + ... + 862878.

It is an arithmetic number, because the mean of its divisors is an integer number (62110368).

Almost surely, 2^405442445 is an apocalyptic number.

It is an amenable number.

405442445 is a deficient number, since it is larger than the sum of its proper divisors (91440499).

405442445 is a wasteful number, since it uses less digits than its factorization.

405442445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725339.

The product of its (nonzero) digits is 51200, while the sum is 32.

The square root of 405442445 is about 20135.6014312958. The cubic root of 405442445 is about 740.1329472603.

Adding to 405442445 its reverse (544244504), we get a palindrome (949686949).

The spelling of 405442445 in words is "four hundred five million, four hundred forty-two thousand, four hundred forty-five".