398159442 has 64 divisors (see below), whose sum is σ = 912912000. Its totient is φ = 128537280.

The previous prime is 398159423. The next prime is 398159449. The reversal of 398159442 is 244951893.

It is not an unprimeable number, because it can be changed into a prime (398159449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 697017 + ... + 697587.

It is an arithmetic number, because the mean of its divisors is an integer number (14264250).

Almost surely, 2^398159442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398159442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456456000).

398159442 is an abundant number, since it is smaller than the sum of its proper divisors (514752558).

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

398159442 is a wasteful number, since it uses less digits than its factorization.

398159442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 962 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 398159442 is about 19953.9329957781. The cubic root of 398159442 is about 735.6744496446.

The spelling of 398159442 in words is "three hundred ninety-eight million, one hundred fifty-nine thousand, four hundred forty-two".