398618351 has 4 divisors (see below), whose sum is σ = 401528112. Its totient is φ = 395708592.

The previous prime is 398618281. The next prime is 398618399. The reversal of 398618351 is 153816893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398618351 - 2²⁶ = 331509487 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 (398618551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454675 + ... + 1454948.

It is an arithmetic number, because the mean of its divisors is an integer number (100382028).

Almost surely, 2^398618351 is an apocalyptic number.

398618351 is a deficient number, since it is larger than the sum of its proper divisors (2909761).

398618351 is a wasteful number, since it uses less digits than its factorization.

398618351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2909760.

The product of its digits is 155520, while the sum is 44.

The square root of 398618351 is about 19965.4288959692. The cubic root of 398618351 is about 735.9569813536.

The spelling of 398618351 in words is "three hundred ninety-eight million, six hundred eighteen thousand, three hundred fifty-one".