398489888 has 48 divisors (see below), whose sum is σ = 827910720. Its totient is φ = 188280576.

The previous prime is 398489887. The next prime is 398489891. The reversal of 398489888 is 888984893.

It is not an unprimeable number, because it can be changed into a prime (398489887) 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, 392870 + ... + 393882.

It is an arithmetic number, because the mean of its divisors is an integer number (17248140).

Almost surely, 2^398489888 is an apocalyptic number.

398489888 is a gapful number since it is divisible by the number (38) 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 398489888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413955360).

398489888 is an abundant number, since it is smaller than the sum of its proper divisors (429420832).

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

398489888 is a wasteful number, since it uses less digits than its factorization.

398489888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1681 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 65.

The square root of 398489888 is about 19962.2115007331. The cubic root of 398489888 is about 735.8779137446.

The spelling of 398489888 in words is "three hundred ninety-eight million, four hundred eighty-nine thousand, eight hundred eighty-eight".