398249056 has 48 divisors (see below), whose sum is σ = 819035280. Its totient is φ = 190425600.

The previous prime is 398249041. The next prime is 398249057. The reversal of 398249056 is 650942893.

It is a super-2 number, since 2×398249056² = 317204621209782272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398248997 and 398249015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398249057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67006 + ... + 72706.

It is an arithmetic number, because the mean of its divisors is an integer number (17063235).

Almost surely, 2^398249056 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 398249056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409517640).

398249056 is an abundant number, since it is smaller than the sum of its proper divisors (420786224).

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

398249056 is a wasteful number, since it uses less digits than its factorization.

398249056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807 (or 5799 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 398249056 is about 19956.1783916661. The cubic root of 398249056 is about 735.7296384104.

The spelling of 398249056 in words is "three hundred ninety-eight million, two hundred forty-nine thousand, fifty-six".