549091920 has 80 divisors (see below), whose sum is σ = 1833132672. Its totient is φ = 135160320.

The previous prime is 549091913. The next prime is 549091931. The reversal of 549091920 is 29190945.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (39).

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 15 ways as a sum of consecutive naturals, for example, 84876 + ... + 91115.

Almost surely, 2^549091920 is an apocalyptic number.

It is an amenable number.

549091920 is an abundant number, since it is smaller than the sum of its proper divisors (1284040752).

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

549091920 is a wasteful number, since it uses less digits than its factorization.

549091920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176020 (or 176014 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 549091920 is about 23432.7104706220. The cubic root of 549091920 is about 818.8701075085.

The spelling of 549091920 in words is "five hundred forty-nine million, ninety-one thousand, nine hundred twenty".