398824013 has 4 divisors (see below), whose sum is σ = 455798880. Its totient is φ = 341849148.

The previous prime is 398824009. The next prime is 398824031. The reversal of 398824013 is 310428893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398824013 - 2² = 398824009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398824043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28487423 + ... + 28487436.

It is an arithmetic number, because the mean of its divisors is an integer number (113949720).

Almost surely, 2^398824013 is an apocalyptic number.

It is an amenable number.

398824013 is a deficient number, since it is larger than the sum of its proper divisors (56974867).

398824013 is an equidigital number, since it uses as much as digits as its factorization.

398824013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56974866.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 398824013 is about 19970.5786846551. The cubic root of 398824013 is about 736.0835287653.

The spelling of 398824013 in words is "three hundred ninety-eight million, eight hundred twenty-four thousand, thirteen".