398987185353 has 16 divisors (see below), whose sum is σ = 551207125440. Its totient is φ = 256549477184.

The previous prime is 398987185351. The next prime is 398987185369. The reversal of 398987185353 is 353581789893.

It is a cyclic number.

It is not a de Polignac number, because 398987185353 - 2¹ = 398987185351 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398987185351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21256326 + ... + 21275087.

It is an arithmetic number, because the mean of its divisors is an integer number (34450445340).

Almost surely, 2^398987185353 is an apocalyptic number.

It is an amenable number.

398987185353 is a deficient number, since it is larger than the sum of its proper divisors (152219940087).

398987185353 is a wasteful number, since it uses less digits than its factorization.

398987185353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42531528.

The product of its digits is 195955200, while the sum is 69.

The spelling of 398987185353 in words is "three hundred ninety-eight billion, nine hundred eighty-seven million, one hundred eighty-five thousand, three hundred fifty-three".