398909909893 has 8 divisors (see below), whose sum is σ = 439241499360. Its totient is φ = 359256162480.

The previous prime is 398909909887. The next prime is 398909909897.

It is a happy number.

398909909893 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398909909893 - 2⁵ = 398909909861 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 (398909909897) 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, 169459278 + ... + 169461631.

It is an arithmetic number, because the mean of its divisors is an integer number (54905187420).

Almost surely, 2^398909909893 is an apocalyptic number.

It is an amenable number.

398909909893 is a deficient number, since it is larger than the sum of its proper divisors (40331589467).

398909909893 is a wasteful number, since it uses less digits than its factorization.

398909909893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338921027.

The product of its (nonzero) digits is 306110016, while the sum is 76.

The spelling of 398909909893 in words is "three hundred ninety-eight billion, nine hundred nine million, nine hundred nine thousand, eight hundred ninety-three".