549128268 has 48 divisors (see below), whose sum is σ = 1533182560. Its totient is φ = 168962112.

The previous prime is 549128263. The next prime is 549128273. The reversal of 549128268 is 862821945.

It is an interprime number because it is at equal distance from previous prime (549128263) and next prime (549128273).

It is not an unprimeable number, because it can be changed into a prime (549128263) 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 15 ways as a sum of consecutive naturals, for example, 194155 + ... + 196962.

Almost surely, 2^549128268 is an apocalyptic number.

It is an amenable number.

549128268 is an abundant number, since it is smaller than the sum of its proper divisors (984054292).

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

549128268 is a wasteful number, since it uses less digits than its factorization.

549128268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391143 (or 391135 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 549128268 is about 23433.4860402801. The cubic root of 549128268 is about 818.8881759064. Note that the first 3 decimals are identical.

The spelling of 549128268 in words is "five hundred forty-nine million, one hundred twenty-eight thousand, two hundred sixty-eight".