549864090 has 24 divisors (see below), whose sum is σ = 1429646868. Its totient is φ = 146630400.

The previous prime is 549864053. The next prime is 549864097. The reversal of 549864090 is 90468945.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 544895649 + 4968441 = 23343^2 + 2229^2 .

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 (549864097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3054711 + ... + 3054890.

Almost surely, 2^549864090 is an apocalyptic number.

549864090 is an abundant number, since it is smaller than the sum of its proper divisors (879782778).

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

549864090 is a wasteful number, since it uses less digits than its factorization.

549864090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109614 (or 6109611 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 549864090 is about 23449.1810091525. The cubic root of 549864090 is about 819.2537777962.

The spelling of 549864090 in words is "five hundred forty-nine million, eight hundred sixty-four thousand, ninety".