549865640 has 32 divisors (see below), whose sum is σ = 1242621000. Its totient is φ = 218982144.

The previous prime is 549865597. The next prime is 549865709. The reversal of 549865640 is 46568945.

It can be written as a sum of positive squares in 4 ways, for example, as 532040356 + 17825284 = 23066^2 + 4222^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20855 + ... + 39174.

Almost surely, 2^549865640 is an apocalyptic number.

It is an amenable number.

549865640 is an abundant number, since it is smaller than the sum of its proper divisors (692755360).

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

549865640 is a wasteful number, since it uses less digits than its factorization.

549865640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60269 (or 60265 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 549865640 is about 23449.2140593240. The cubic root of 549865640 is about 819.2545475877.

The spelling of 549865640 in words is "five hundred forty-nine million, eight hundred sixty-five thousand, six hundred forty".