398857211 has 4 divisors (see below), whose sum is σ = 401061024. Its totient is φ = 396653400.

The previous prime is 398857157. The next prime is 398857219. The reversal of 398857211 is 112758893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112758893 = 13 ⋅8673761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398857211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398857219) 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, 1101635 + ... + 1101996.

It is an arithmetic number, because the mean of its divisors is an integer number (100265256).

Almost surely, 2^398857211 is an apocalyptic number.

398857211 is a deficient number, since it is larger than the sum of its proper divisors (2203813).

398857211 is a wasteful number, since it uses less digits than its factorization.

398857211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203812.

The product of its digits is 120960, while the sum is 44.

The square root of 398857211 is about 19971.4098400689. The cubic root of 398857211 is about 736.1039519947.

The spelling of 398857211 in words is "three hundred ninety-eight million, eight hundred fifty-seven thousand, two hundred eleven".