398143458 has 64 divisors (see below), whose sum is σ = 919296000. Its totient is φ = 127619712.

The previous prime is 398143429. The next prime is 398143463. The reversal of 398143458 is 854341893.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176703 + ... + 178941.

It is an arithmetic number, because the mean of its divisors is an integer number (14364000).

Almost surely, 2^398143458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398143458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459648000).

398143458 is an abundant number, since it is smaller than the sum of its proper divisors (521152542).

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

398143458 is a wasteful number, since it uses less digits than its factorization.

398143458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376 (or 2370 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 398143458 is about 19953.5324692146. The cubic root of 398143458 is about 735.6646050308.

The spelling of 398143458 in words is "three hundred ninety-eight million, one hundred forty-three thousand, four hundred fifty-eight".