398918853 has 6 divisors (see below), whose sum is σ = 576216134. Its totient is φ = 265945896.

The previous prime is 398918801. The next prime is 398918857. The reversal of 398918853 is 358819893.

It can be written as a sum of positive squares in only one way, i.e., 297976644 + 100942209 = 17262^2 + 10047^2 .

It is not a de Polignac number, because 398918853 - 2⁹ = 398918341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398918853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398918857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22162150 + ... + 22162167.

Almost surely, 2^398918853 is an apocalyptic number.

It is an amenable number.

398918853 is a deficient number, since it is larger than the sum of its proper divisors (177297281).

398918853 is a wasteful number, since it uses less digits than its factorization.

398918853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44324323 (or 44324320 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 398918853 is about 19972.9530365442. The cubic root of 398918853 is about 736.1418708132.

The spelling of 398918853 in words is "three hundred ninety-eight million, nine hundred eighteen thousand, eight hundred fifty-three".