549749640 has 64 divisors (see below), whose sum is σ = 1799184960. Its totient is φ = 133272320.

The previous prime is 549749617. The next prime is 549749653. The reversal of 549749640 is 46947945.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 549749640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206919 + ... + 209558.

It is an arithmetic number, because the mean of its divisors is an integer number (28112265).

Almost surely, 2^549749640 is an apocalyptic number.

It is an amenable number.

549749640 is an abundant number, since it is smaller than the sum of its proper divisors (1249435320).

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

549749640 is a wasteful number, since it uses less digits than its factorization.

549749640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416502 (or 416498 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 549749640 is about 23446.7404984147. The cubic root of 549749640 is about 819.1969333852.

The spelling of 549749640 in words is "five hundred forty-nine million, seven hundred forty-nine thousand, six hundred forty".