549009944 has 32 divisors (see below), whose sum is σ = 1181752320. Its totient is φ = 234229536.

The previous prime is 549009941. The next prime is 549009949. The reversal of 549009944 is 449900945.

It is a super-2 number, since 2×549009944² = 602823837221766272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 549009895 and 549009904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549009941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9494 + ... + 34469.

It is an arithmetic number, because the mean of its divisors is an integer number (36929760).

Almost surely, 2^549009944 is an apocalyptic number.

It is an amenable number.

549009944 is an abundant number, since it is smaller than the sum of its proper divisors (632742376).

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

549009944 is a wasteful number, since it uses less digits than its factorization.

549009944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44199 (or 44195 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 549009944 is about 23430.9612265481. The cubic root of 549009944 is about 818.8293547466.

The spelling of 549009944 in words is "five hundred forty-nine million, nine thousand, nine hundred forty-four".