405640419 has 8 divisors (see below), whose sum is σ = 542387472. Its totient is φ = 269660160.

The previous prime is 405640393. The next prime is 405640421. The reversal of 405640419 is 914046504.

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

It is a de Polignac number, because none of the positive numbers 2^k-405640419 is a prime.

It is a super-2 number, since 2×405640419² = 329088299052991122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 405640419.

It is not an unprimeable number, because it can be changed into a prime (405640439) 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, 190462 + ... + 192579.

It is an arithmetic number, because the mean of its divisors is an integer number (67798434).

Almost surely, 2^405640419 is an apocalyptic number.

405640419 is a deficient number, since it is larger than the sum of its proper divisors (136747053).

405640419 is a wasteful number, since it uses less digits than its factorization.

405640419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383397.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 405640419 is about 20140.5168503691. The cubic root of 405640419 is about 740.2533944730.

The spelling of 405640419 in words is "four hundred five million, six hundred forty thousand, four hundred nineteen".