398810280 has 128 divisors (see below), whose sum is σ = 1337212800. Its totient is φ = 94310400.

The previous prime is 398810267. The next prime is 398810311. The reversal of 398810280 is 82018893.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50436 + ... + 57804.

It is an arithmetic number, because the mean of its divisors is an integer number (10446975).

Almost surely, 2^398810280 is an apocalyptic number.

398810280 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 398810280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668606400).

398810280 is an abundant number, since it is smaller than the sum of its proper divisors (938402520).

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

398810280 is a wasteful number, since it uses less digits than its factorization.

398810280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7435 (or 7431 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 398810280 is about 19970.2348508975. The cubic root of 398810280 is about 736.0750799668.

The spelling of 398810280 in words is "three hundred ninety-eight million, eight hundred ten thousand, two hundred eighty".