549549900 has 144 divisors (see below), whose sum is σ = 1814779680. Its totient is φ = 142560000.

The previous prime is 549549893. The next prime is 549549907. The reversal of 549549900 is 9945945.

It is an interprime number because it is at equal distance from previous prime (549549893) and next prime (549549907).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (549549907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97150 + ... + 102650.

Almost surely, 2^549549900 is an apocalyptic number.

549549900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549549900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907389840).

549549900 is an abundant number, since it is smaller than the sum of its proper divisors (1265229780).

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

549549900 is a wasteful number, since it uses less digits than its factorization.

549549900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5548 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 549549900 is about 23442.4806707823. The cubic root of 549549900 is about 819.0977086931.

The spelling of 549549900 in words is "five hundred forty-nine million, five hundred forty-nine thousand, nine hundred".