549139500 has 480 divisors, whose sum is σ = 2219817600. Its totient is φ = 115084800.

The previous prime is 549139471. The next prime is 549139511. The reversal of 549139500 is 5931945.

549139500 = 183² + 184² + ... + 1182².

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 159 ways as a sum of consecutive naturals, for example, 3685426 + ... + 3685574.

It is an arithmetic number, because the mean of its divisors is an integer number (4624620).

Almost surely, 2^549139500 is an apocalyptic number.

549139500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549139500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109908800).

549139500 is an abundant number, since it is smaller than the sum of its proper divisors (1670678100).

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

549139500 is a wasteful number, since it uses less digits than its factorization.

549139500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 549139500 is about 23433.7256960988. The cubic root of 549139500 is about 818.8937591128.

The spelling of 549139500 in words is "five hundred forty-nine million, one hundred thirty-nine thousand, five hundred".