55490 has 16 divisors (see below), whose sum is σ = 103680. Its totient is φ = 21360.

The previous prime is 55487. The next prime is 55501. The reversal of 55490 is 9455.

55490 = 135² + 136² + 137².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221 + ... + 399.

It is an arithmetic number, because the mean of its divisors is an integer number (6480).

2⁵⁵⁴⁹⁰ is an apocalyptic number.

55490 is a deficient number, since it is larger than the sum of its proper divisors (48190).

55490 is a wasteful number, since it uses less digits than its factorization.

55490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55490 is about 235.5631550137. The cubic root of 55490 is about 38.1421270356.

It can be divided in two parts, 55 and 490, that added together give a palindrome (545).

The spelling of 55490 in words is "fifty-five thousand, four hundred ninety".