398872386 has 72 divisors (see below), whose sum is σ = 972251280. Its totient is φ = 118031760.

The previous prime is 398872363. The next prime is 398872387. The reversal of 398872386 is 683278893.

It is not an unprimeable number, because it can be changed into a prime (398872387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 91525 + ... + 95783.

It is an arithmetic number, because the mean of its divisors is an integer number (13503490).

Almost surely, 2^398872386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398872386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486125640).

398872386 is an abundant number, since it is smaller than the sum of its proper divisors (573378894).

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

398872386 is a wasteful number, since it uses less digits than its factorization.

398872386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332 (or 4318 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 398872386 is about 19971.7897545513. The cubic root of 398872386 is about 736.1132871950.

The spelling of 398872386 in words is "three hundred ninety-eight million, eight hundred seventy-two thousand, three hundred eighty-six".