549423540 has 192 divisors, whose sum is σ = 1842462720. Its totient is φ = 135527040.

The previous prime is 549423481. The next prime is 549423559. The reversal of 549423540 is 45324945.

It is a happy number.

549423540 is a `hidden beast` number, since 5 + 4 + 94 + 23 + 540 = 666.

549423540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×549423540² = 603732452612263200, 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 = 549423495 and 549423504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 384307 + ... + 385733.

It is an arithmetic number, because the mean of its divisors is an integer number (9596160).

Almost surely, 2^549423540 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 549423540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921231360).

549423540 is an abundant number, since it is smaller than the sum of its proper divisors (1293039180).

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

549423540 is a wasteful number, since it uses less digits than its factorization.

549423540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 549423540 is about 23439.7854085740. The cubic root of 549423540 is about 819.0349245127.

The spelling of 549423540 in words is "five hundred forty-nine million, four hundred twenty-three thousand, five hundred forty".