398200261 has 4 divisors (see below), whose sum is σ = 398240172. Its totient is φ = 398160352.

The previous prime is 398200193. The next prime is 398200267. The reversal of 398200261 is 162002893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 155775361 + 242424900 = 12481^2 + 15570^2 .

It is a cyclic number.

It is not a de Polignac number, because 398200261 - 2⁷ = 398200133 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 (398200267) 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, 9915 + ... + 29911.

It is an arithmetic number, because the mean of its divisors is an integer number (99560043).

Almost surely, 2^398200261 is an apocalyptic number.

It is an amenable number.

398200261 is a deficient number, since it is larger than the sum of its proper divisors (39911).

398200261 is a wasteful number, since it uses less digits than its factorization.

398200261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39910.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 398200261 is about 19954.9558005023. The cubic root of 398200261 is about 735.6995890452.

The spelling of 398200261 in words is "three hundred ninety-eight million, two hundred thousand, two hundred sixty-one".