398949852 has 96 divisors (see below), whose sum is σ = 1088446464. Its totient is φ = 111384000.

The previous prime is 398949841. The next prime is 398949857. The reversal of 398949852 is 258949893.

It is a junction number, because it is equal to n+sod(n) for n = 398949792 and 398949801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398949857) 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, 900343 + ... + 900785.

It is an arithmetic number, because the mean of its divisors is an integer number (11337984).

Almost surely, 2^398949852 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 398949852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544223232).

398949852 is an abundant number, since it is smaller than the sum of its proper divisors (689496612).

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

398949852 is a wasteful number, since it uses less digits than its factorization.

398949852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 57.

The square root of 398949852 is about 19973.7290459243. The cubic root of 398949852 is about 736.1609382422.

The spelling of 398949852 in words is "three hundred ninety-eight million, nine hundred forty-nine thousand, eight hundred fifty-two".