549945880 has 128 divisors (see below), whose sum is σ = 1433376000. Its totient is φ = 187799040.

The previous prime is 549945871. The next prime is 549945889. The reversal of 549945880 is 88549945.

It is an interprime number because it is at equal distance from previous prime (549945871) and next prime (549945889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549945889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1312311 + ... + 1312729.

It is an arithmetic number, because the mean of its divisors is an integer number (11198250).

Almost surely, 2^549945880 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 549945880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716688000).

549945880 is an abundant number, since it is smaller than the sum of its proper divisors (883430120).

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

549945880 is a wasteful number, since it uses less digits than its factorization.

549945880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The square root of 549945880 is about 23450.9249284543. The cubic root of 549945880 is about 819.2943959815.

The spelling of 549945880 in words is "five hundred forty-nine million, nine hundred forty-five thousand, eight hundred eighty".