398876280 has 128 divisors (see below), whose sum is σ = 1340858880. Its totient is φ = 94072320.

The previous prime is 398876279. The next prime is 398876297. The reversal of 398876280 is 82678893.

398876280 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 44757 + ... + 52923.

It is an arithmetic number, because the mean of its divisors is an integer number (10475460).

Almost surely, 2^398876280 is an apocalyptic number.

398876280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398876280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670429440).

398876280 is an abundant number, since it is smaller than the sum of its proper divisors (941982600).

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

398876280 is a wasteful number, since it uses less digits than its factorization.

398876280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229 (or 8225 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 398876280 is about 19971.8872418207. The cubic root of 398876280 is about 736.1156826276.

It can be divided in two parts, 398 and 876280, that added together give a palindrome (876678).

The spelling of 398876280 in words is "three hundred ninety-eight million, eight hundred seventy-six thousand, two hundred eighty".