549037440 has 640 divisors, whose sum is σ = 2399284800. Its totient is φ = 116785152.

The previous prime is 549037429. The next prime is 549037451. The reversal of 549037440 is 44730945.

549037440 is a `hidden beast` number, since 549 + 0 + 3 + 74 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (549037429) and next prime (549037451).

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×549037440² = 602884221043507200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 549037395 and 549037404.

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 6168916 + ... + 6169004.

Almost surely, 2^549037440 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 549037440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199642400).

549037440 is an abundant number, since it is smaller than the sum of its proper divisors (1850247360).

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

549037440 is a wasteful number, since it uses less digits than its factorization.

549037440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 549037440 is about 23431.5479642298. The cubic root of 549037440 is about 818.8430242963.

The spelling of 549037440 in words is "five hundred forty-nine million, thirty-seven thousand, four hundred forty".