549275904 has 90 divisors (see below), whose sum is σ = 1637903190. Its totient is φ = 183085056.

The previous prime is 549275897. The next prime is 549275917. The reversal of 549275904 is 409572945.

549275904 is a `hidden beast` number, since 5 + 492 + 75 + 90 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 406425600 + 142850304 = 20160^2 + 11952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 549275904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7492 + ... + 33980.

Almost surely, 2^549275904 is an apocalyptic number.

549275904 is a gapful number since it is divisible by the number (54) 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 549275904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818951595).

549275904 is an abundant number, since it is smaller than the sum of its proper divisors (1088627286).

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

549275904 is an equidigital number, since it uses as much as digits as its factorization.

549275904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26517 (or 26494 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 549275904 is about 23436.6359360724. The cubic root of 549275904 is about 818.9615567835.

The spelling of 549275904 in words is "five hundred forty-nine million, two hundred seventy-five thousand, nine hundred four".