549878868 has 336 divisors, whose sum is σ = 1880309760. Its totient is φ = 136468800.

The previous prime is 549878863. The next prime is 549878873. The reversal of 549878868 is 868878945.

549878868 is a `hidden beast` number, since 5 + 498 + 7 + 88 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (549878863) and next prime (549878873).

It is a super-2 number, since 2×549878868² = 604733538945922848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549878863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 6960453 + ... + 6960531.

It is an arithmetic number, because the mean of its divisors is an integer number (5596160).

Almost surely, 2^549878868 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 549878868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940154880).

549878868 is an abundant number, since it is smaller than the sum of its proper divisors (1330430892).

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

549878868 is a wasteful number, since it uses less digits than its factorization.

549878868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 133 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 63.

The square root of 549878868 is about 23449.4961139893. The cubic root of 549878868 is about 819.2611170788.

The spelling of 549878868 in words is "five hundred forty-nine million, eight hundred seventy-eight thousand, eight hundred sixty-eight".