405340422 has 8 divisors (see below), whose sum is σ = 810680856. Its totient is φ = 135113472.

The previous prime is 405340421. The next prime is 405340423. The reversal of 405340422 is 224043504.

It is an interprime number because it is at equal distance from previous prime (405340421) and next prime (405340423).

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

405340422 is an admirable number.

It is a super-3 number, since 3×405340422³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405340392 and 405340401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405340421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33778363 + ... + 33778374.

It is an arithmetic number, because the mean of its divisors is an integer number (101335107).

Almost surely, 2^405340422 is an apocalyptic number.

405340422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405340422 is a wasteful number, since it uses less digits than its factorization.

405340422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67556742.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 405340422 is about 20133.0678735259. The cubic root of 405340422 is about 740.0708612444.

Adding to 405340422 its reverse (224043504), we get a palindrome (629383926).

The spelling of 405340422 in words is "four hundred five million, three hundred forty thousand, four hundred twenty-two".