5811898 has 4 divisors (see below), whose sum is σ = 8717850. Its totient is φ = 2905948.

The previous prime is 5811889. The next prime is 5811899. The reversal of 5811898 is 8981185.

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

It can be written as a sum of positive squares in only one way, i.e., 4915089 + 896809 = 2217^2 + 947^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 5811898.

It is not an unprimeable number, because it can be changed into a prime (5811899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452973 + ... + 1452976.

Almost surely, 2^5811898 is an apocalyptic number.

5811898 is a deficient number, since it is larger than the sum of its proper divisors (2905952).

5811898 is a wasteful number, since it uses less digits than its factorization.

5811898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905951.

The product of its digits is 23040, while the sum is 40.

The square root of 5811898 is about 2410.7878380314. The cubic root of 5811898 is about 179.7929512295.

The spelling of 5811898 in words is "five million, eight hundred eleven thousand, eight hundred ninety-eight".