549642834 has 80 divisors (see below), whose sum is σ = 1369294080. Its totient is φ = 163645920.

The previous prime is 549642833. The next prime is 549642851. The reversal of 549642834 is 438246945.

It is a self number, because there is not a number n which added to its sum of digits gives 549642834.

It is not an unprimeable number, because it can be changed into a prime (549642833) 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 39 ways as a sum of consecutive naturals, for example, 61077 + ... + 69495.

It is an arithmetic number, because the mean of its divisors is an integer number (17116176).

Almost surely, 2^549642834 is an apocalyptic number.

549642834 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 549642834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684647040).

549642834 is an abundant number, since it is smaller than the sum of its proper divisors (819651246).

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

549642834 is a wasteful number, since it uses less digits than its factorization.

549642834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477 (or 8468 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 549642834 is about 23444.4627577601. The cubic root of 549642834 is about 819.1438784379.

The spelling of 549642834 in words is "five hundred forty-nine million, six hundred forty-two thousand, eight hundred thirty-four".