398198720 has 112 divisors (see below), whose sum is σ = 989307648. Its totient is φ = 152494080.

The previous prime is 398198707. The next prime is 398198741. The reversal of 398198720 is 27891893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1358894 + ... + 1359186.

It is an arithmetic number, because the mean of its divisors is an integer number (8833104).

Almost surely, 2^398198720 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 398198720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494653824).

398198720 is an abundant number, since it is smaller than the sum of its proper divisors (591108928).

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

398198720 is a wasteful number, since it uses less digits than its factorization.

398198720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 398198720 is about 19954.9171885027. The cubic root of 398198720 is about 735.6986400131.

The spelling of 398198720 in words is "three hundred ninety-eight million, one hundred ninety-eight thousand, seven hundred twenty".