5490981 has 24 divisors (see below), whose sum is σ = 8442720. Its totient is φ = 3429216.

The previous prime is 5490973. The next prime is 5491001. The reversal of 5490981 is 1890945.

It is not a de Polignac number, because 5490981 - 2³ = 5490973 is a prime.

It is a super-2 number, since 2×5490981² = 60301744684722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5490931) 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 in 23 ways as a sum of consecutive naturals, for example, 27775 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (351780).

Almost surely, 2^5490981 is an apocalyptic number.

It is an amenable number.

5490981 is a deficient number, since it is larger than the sum of its proper divisors (2951739).

5490981 is a wasteful number, since it uses less digits than its factorization.

5490981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 5490981 is about 2343.2842337198. The cubic root of 5490981 is about 176.4208784888.

Subtracting from 5490981 its sum of digits (36), we obtain a palindrome (5490945).

The spelling of 5490981 in words is "five million, four hundred ninety thousand, nine hundred eighty-one".