549543138 has 48 divisors (see below), whose sum is σ = 1150507776. Its totient is φ = 174810240.

The previous prime is 549543133. The next prime is 549543143. The reversal of 549543138 is 831345945.

It is an interprime number because it is at equal distance from previous prime (549543133) and next prime (549543143).

It is a self number, because there is not a number n which added to its sum of digits gives 549543138.

It is not an unprimeable number, because it can be changed into a prime (549543133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1473120 + ... + 1473492.

It is an arithmetic number, because the mean of its divisors is an integer number (23968912).

Almost surely, 2^549543138 is an apocalyptic number.

549543138 is an abundant number, since it is smaller than the sum of its proper divisors (600964638).

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

549543138 is a wasteful number, since it uses less digits than its factorization.

549543138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 498 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 549543138 is about 23442.3364449877. The cubic root of 549543138 is about 819.0943491187.

The spelling of 549543138 in words is "five hundred forty-nine million, five hundred forty-three thousand, one hundred thirty-eight".