549739872 has 144 divisors (see below), whose sum is σ = 1768882752. Its totient is φ = 166561920.

The previous prime is 549739807. The next prime is 549739877. The reversal of 549739872 is 278937945.

549739872 is a `hidden beast` number, since 549 + 7 + 3 + 98 + 7 + 2 = 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 (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549739877) 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, 82323 + ... + 88749.

It is an arithmetic number, because the mean of its divisors is an integer number (12283908).

Almost surely, 2^549739872 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 549739872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884441376).

549739872 is an abundant number, since it is smaller than the sum of its proper divisors (1219142880).

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

549739872 is a wasteful number, since it uses less digits than its factorization.

549739872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6463 (or 6443 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 549739872 is about 23446.5321956148. The cubic root of 549739872 is about 819.1920815020.

It can be divided in two parts, 5497 and 39872, that added together give a square (45369 = 213²).

The spelling of 549739872 in words is "five hundred forty-nine million, seven hundred thirty-nine thousand, eight hundred seventy-two".