549868140 has 72 divisors (see below), whose sum is σ = 1669934448. Its totient is φ = 146455680.

The previous prime is 549868093. The next prime is 549868147. The reversal of 549868140 is 41868945.

549868140 is a `hidden beast` number, since 549 + 8 + 68 + 1 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (549868147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229750 + ... + 232130.

It is an arithmetic number, because the mean of its divisors is an integer number (23193534).

Almost surely, 2^549868140 is an apocalyptic number.

It is an amenable number.

549868140 is an abundant number, since it is smaller than the sum of its proper divisors (1120066308).

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

549868140 is a wasteful number, since it uses less digits than its factorization.

549868140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 549868140 is about 23449.2673659541. The cubic root of 549868140 is about 819.2557891839.

The spelling of 549868140 in words is "five hundred forty-nine million, eight hundred sixty-eight thousand, one hundred forty".