549297840 has 240 divisors, whose sum is σ = 2133800928. Its totient is φ = 115863552.

The previous prime is 549297839. The next prime is 549297857. The reversal of 549297840 is 48792945.

549297840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-3 number, since 3×549297840³ (a number of 27 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 549297840.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151084 + ... + 154676.

Almost surely, 2^549297840 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 549297840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066900464).

549297840 is an abundant number, since it is smaller than the sum of its proper divisors (1584503088).

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

549297840 is a wasteful number, since it uses less digits than its factorization.

549297840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636 (or 3623 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 549297840 is about 23437.1039166532. The cubic root of 549297840 is about 818.9724587130.

The spelling of 549297840 in words is "five hundred forty-nine million, two hundred ninety-seven thousand, eight hundred forty".