5491998 has 12 divisors (see below), whose sum is σ = 11899368. Its totient is φ = 1830660.

The previous prime is 5491979. The next prime is 5491999. The reversal of 5491998 is 8991945.

5491998 is a `hidden beast` number, since 549 + 19 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491999) 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 in 5 ways as a sum of consecutive naturals, for example, 152538 + ... + 152573.

It is an arithmetic number, because the mean of its divisors is an integer number (991614).

Almost surely, 2^5491998 is an apocalyptic number.

5491998 is an abundant number, since it is smaller than the sum of its proper divisors (6407370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5491998 is a wasteful number, since it uses less digits than its factorization.

5491998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305119 (or 305116 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 5491998 is about 2343.5012267972. The cubic root of 5491998 is about 176.4317696185.

The spelling of 5491998 in words is "five million, four hundred ninety-one thousand, nine hundred ninety-eight".