398580813 has 24 divisors (see below), whose sum is σ = 589867200. Its totient is φ = 259262784.

The previous prime is 398580781. The next prime is 398580817. The reversal of 398580813 is 318085893.

It is not a de Polignac number, because 398580813 - 2⁵ = 398580781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398580817) 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, 70008 + ... + 75486.

It is an arithmetic number, because the mean of its divisors is an integer number (24577800).

Almost surely, 2^398580813 is an apocalyptic number.

It is an amenable number.

398580813 is a deficient number, since it is larger than the sum of its proper divisors (191286387).

398580813 is a wasteful number, since it uses less digits than its factorization.

398580813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5678 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 398580813 is about 19964.4887988648. The cubic root of 398580813 is about 735.9338788711.

The spelling of 398580813 in words is "three hundred ninety-eight million, five hundred eighty thousand, eight hundred thirteen".