398005422 has 16 divisors (see below), whose sum is σ = 800779392. Its totient is φ = 131873720.

The previous prime is 398005381. The next prime is 398005423. The reversal of 398005422 is 224500893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398005423) 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, 197604 + ... + 199607.

It is an arithmetic number, because the mean of its divisors is an integer number (50048712).

Almost surely, 2^398005422 is an apocalyptic number.

398005422 is an abundant number, since it is smaller than the sum of its proper divisors (402773970).

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

398005422 is a wasteful number, since it uses less digits than its factorization.

398005422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397383.

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

The square root of 398005422 is about 19950.0732329483. The cubic root of 398005422 is about 735.5795771050.

The spelling of 398005422 in words is "three hundred ninety-eight million, five thousand, four hundred twenty-two".