549261380 has 24 divisors (see below), whose sum is σ = 1154623680. Its totient is φ = 219480800.

The previous prime is 549261373. The next prime is 549261397. The reversal of 549261380 is 83162945.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6905 + ... + 33855.

It is an arithmetic number, because the mean of its divisors is an integer number (48109320).

Almost surely, 2^549261380 is an apocalyptic number.

It is an amenable number.

549261380 is an abundant number, since it is smaller than the sum of its proper divisors (605362300).

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

549261380 is a wasteful number, since it uses less digits than its factorization.

549261380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27979 (or 27977 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 549261380 is about 23436.3260772673. The cubic root of 549261380 is about 818.9543383695.

The spelling of 549261380 in words is "five hundred forty-nine million, two hundred sixty-one thousand, three hundred eighty".