398831004 has 108 divisors (see below), whose sum is σ = 1193549448. Its totient is φ = 111545280.

The previous prime is 398831003. The next prime is 398831021. The reversal of 398831004 is 400138893.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 398831004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398831003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53107 + ... + 60149.

Almost surely, 2^398831004 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 398831004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596774724).

398831004 is an abundant number, since it is smaller than the sum of its proper divisors (794718444).

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

398831004 is a wasteful number, since it uses less digits than its factorization.

398831004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7088 (or 7072 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 398831004 is about 19970.7537163723. The cubic root of 398831004 is about 736.0878296847.

Adding to 398831004 its reverse (400138893), we get a palindrome (798969897).

The spelling of 398831004 in words is "three hundred ninety-eight million, eight hundred thirty-one thousand, four".