549890544 has 120 divisors (see below), whose sum is σ = 1667906640. Its totient is φ = 155645952.

The previous prime is 549890519. The next prime is 549890567. The reversal of 549890544 is 445098945.

It is a super-2 number, since 2×549890544² = 604759220761231872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 549890493 and 549890502.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 264742 + ... + 266810.

It is an arithmetic number, because the mean of its divisors is an integer number (13899222).

Almost surely, 2^549890544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549890544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833953320).

549890544 is an abundant number, since it is smaller than the sum of its proper divisors (1118016096).

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

549890544 is a wasteful number, since it uses less digits than its factorization.

549890544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 549890544 is about 23449.7450732412. The cubic root of 549890544 is about 819.2669157044.

The spelling of 549890544 in words is "five hundred forty-nine million, eight hundred ninety thousand, five hundred forty-four".