398716812 has 72 divisors (see below), whose sum is σ = 1110693584. Its totient is φ = 119822976.

The previous prime is 398716789. The next prime is 398716817. The reversal of 398716812 is 218617893.

It is not an unprimeable number, because it can be changed into a prime (398716817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10218 + ... + 30030.

Almost surely, 2^398716812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398716812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555346792).

398716812 is an abundant number, since it is smaller than the sum of its proper divisors (711976772).

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

398716812 is a wasteful number, since it uses less digits than its factorization.

398716812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19879 (or 19874 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 398716812 is about 19967.8945309715. The cubic root of 398716812 is about 736.0175715520.

The spelling of 398716812 in words is "three hundred ninety-eight million, seven hundred sixteen thousand, eight hundred twelve".