398833386 has 64 divisors (see below), whose sum is σ = 962150400. Its totient is φ = 107750016.

The previous prime is 398833381. The next prime is 398833423. The reversal of 398833386 is 683338893.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398833381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83655 + ... + 88293.

It is an arithmetic number, because the mean of its divisors is an integer number (15033600).

Almost surely, 2^398833386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398833386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481075200).

398833386 is an abundant number, since it is smaller than the sum of its proper divisors (563317014).

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

398833386 is a wasteful number, since it uses less digits than its factorization.

398833386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763.

The product of its digits is 2239488, while the sum is 51.

The square root of 398833386 is about 19970.8133534916. The cubic root of 398833386 is about 736.0892950988.

The spelling of 398833386 in words is "three hundred ninety-eight million, eight hundred thirty-three thousand, three hundred eighty-six".