398442252 has 72 divisors (see below), whose sum is σ = 1037270416. Its totient is φ = 118331136.

The previous prime is 398442251. The next prime is 398442269. The reversal of 398442252 is 252244893.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 398442252.

It is not an unprimeable number, because it can be changed into a prime (398442251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129678 + ... + 132714.

Almost surely, 2^398442252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398442252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518635208).

398442252 is an abundant number, since it is smaller than the sum of its proper divisors (638828164).

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

398442252 is a wasteful number, since it uses less digits than its factorization.

398442252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115 (or 3084 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 398442252 is about 19961.0183106975. The cubic root of 398442252 is about 735.8485899749.

The spelling of 398442252 in words is "three hundred ninety-eight million, four hundred forty-two thousand, two hundred fifty-two".