549667980 has 72 divisors (see below), whose sum is σ = 1674376704. Its totient is φ = 145958400.

The previous prime is 549667939. The next prime is 549667981. The reversal of 549667980 is 89766945.

549667980 is a `hidden beast` number, since 5 + 496 + 6 + 79 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (549667981) 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, 37045 + ... + 49715.

It is an arithmetic number, because the mean of its divisors is an integer number (23255232).

Almost surely, 2^549667980 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 549667980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837188352).

549667980 is an abundant number, since it is smaller than the sum of its proper divisors (1124708724).

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

549667980 is a wasteful number, since it uses less digits than its factorization.

549667980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12927 (or 12922 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 549667980 is about 23444.9990403071. Note that the first 3 decimals coincide. The cubic root of 549667980 is about 819.1563701122.

The spelling of 549667980 in words is "five hundred forty-nine million, six hundred sixty-seven thousand, nine hundred eighty".