549745920 has 144 divisors (see below), whose sum is σ = 1950957120. Its totient is φ = 146589696.

The previous prime is 549745913. The next prime is 549745951. The reversal of 549745920 is 29547945.

549745920 is a `hidden beast` number, since 54 + 9 + 7 + 4 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26607 + ... + 42513.

Almost surely, 2^549745920 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 549745920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975478560).

549745920 is an abundant number, since it is smaller than the sum of its proper divisors (1401211200).

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

549745920 is a wasteful number, since it uses less digits than its factorization.

549745920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15937 (or 15917 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 549745920 is about 23446.6611695567. The cubic root of 549745920 is about 819.1950856232.

The spelling of 549745920 in words is "five hundred forty-nine million, seven hundred forty-five thousand, nine hundred twenty".