398435922 has 24 divisors (see below), whose sum is σ = 895252176. Its totient is φ = 132811812.

The previous prime is 398435887. The next prime is 398435929. The reversal of 398435922 is 229534893.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (398435929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409428 + ... + 410399.

It is an arithmetic number, because the mean of its divisors is an integer number (37302174).

Almost surely, 2^398435922 is an apocalyptic number.

398435922 is an abundant number, since it is smaller than the sum of its proper divisors (496816254).

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

398435922 is an equidigital number, since it uses as much as digits as its factorization.

398435922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819844 (or 819832 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 398435922 is about 19960.8597510227. The cubic root of 398435922 is about 735.8446931774.

The spelling of 398435922 in words is "three hundred ninety-eight million, four hundred thirty-five thousand, nine hundred twenty-two".