406642422 has 16 divisors (see below), whose sum is σ = 813608640. Its totient is φ = 135493512.

The previous prime is 406642421. The next prime is 406642429. The reversal of 406642422 is 224246604.

It is a self number, because there is not a number n which added to its sum of digits gives 406642422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406642421) 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, 4729 + ... + 28907.

It is an arithmetic number, because the mean of its divisors is an integer number (50850540).

Almost surely, 2^406642422 is an apocalyptic number.

406642422 is an abundant number, since it is smaller than the sum of its proper divisors (406966218).

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

406642422 is a wasteful number, since it uses less digits than its factorization.

406642422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26987.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 406642422 is about 20165.3768127452. The cubic root of 406642422 is about 740.8624118725.

The spelling of 406642422 in words is "four hundred six million, six hundred forty-two thousand, four hundred twenty-two".