549481872 has 20 divisors (see below), whose sum is σ = 1419494960. Its totient is φ = 183160608.

The previous prime is 549481859. The next prime is 549481897. The reversal of 549481872 is 278184945.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 11447539 = 549481872 / (5 + 4 + 9 + 4 + 8 + 1 + 8 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5723722 + ... + 5723817.

It is an arithmetic number, because the mean of its divisors is an integer number (70974748).

Almost surely, 2^549481872 is an apocalyptic number.

It is an amenable number.

549481872 is an abundant number, since it is smaller than the sum of its proper divisors (870013088).

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

549481872 is a wasteful number, since it uses less digits than its factorization.

549481872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11447550 (or 11447544 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 549481872 is about 23441.0296702171. The cubic root of 549481872 is about 819.0639089852.

The spelling of 549481872 in words is "five hundred forty-nine million, four hundred eighty-one thousand, eight hundred seventy-two".