549875820 has 96 divisors (see below), whose sum is σ = 1676928960. Its totient is φ = 133833216.

The previous prime is 549875819. The next prime is 549875839. The reversal of 549875820 is 28578945.

It is a self number, because there is not a number n which added to its sum of digits gives 549875820.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 1157 × 445 × 1068.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6178336 + ... + 6178424.

It is an arithmetic number, because the mean of its divisors is an integer number (17468010).

Almost surely, 2^549875820 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 549875820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838464480).

549875820 is an abundant number, since it is smaller than the sum of its proper divisors (1127053140).

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

549875820 is an equidigital number, since it uses as much as digits as its factorization.

549875820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 549875820 is about 23449.4311231637. The cubic root of 549875820 is about 819.2596033439.

It can be divided in two parts, 5498 and 75820, that added together give a palindrome (81318).

The spelling of 549875820 in words is "five hundred forty-nine million, eight hundred seventy-five thousand, eight hundred twenty".