5491858 has 4 divisors (see below), whose sum is σ = 8237790. Its totient is φ = 2745928.

The previous prime is 5491847. The next prime is 5491859. The reversal of 5491858 is 8581945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8581945 = 5 ⋅1716389.

It can be written as a sum of positive squares in only one way, i.e., 5489649 + 2209 = 2343^2 + 47^2 .

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 5491858.

It is not an unprimeable number, because it can be changed into a prime (5491859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1372963 + ... + 1372966.

Almost surely, 2^5491858 is an apocalyptic number.

5491858 is a deficient number, since it is larger than the sum of its proper divisors (2745932).

5491858 is a wasteful number, since it uses less digits than its factorization.

5491858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745931.

The product of its digits is 57600, while the sum is 40.

The square root of 5491858 is about 2343.4713567697. The cubic root of 5491858 is about 176.4302704277.

The spelling of 5491858 in words is "five million, four hundred ninety-one thousand, eight hundred fifty-eight".