273640728 has 16 divisors (see below), whose sum is σ = 684101880. Its totient is φ = 91213568.

The previous prime is 273640727. The next prime is 273640739. The reversal of 273640728 is 827046372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273640727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5700825 + ... + 5700872.

Almost surely, 2^273640728 is an apocalyptic number.

It is an amenable number.

273640728 is an abundant number, since it is smaller than the sum of its proper divisors (410461152).

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

273640728 is a wasteful number, since it uses less digits than its factorization.

273640728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11401706 (or 11401702 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 273640728 is about 16542.0895898916. The cubic root of 273640728 is about 649.2225244631. Note that the first 3 decimals are identical.

The spelling of 273640728 in words is "two hundred seventy-three million, six hundred forty thousand, seven hundred twenty-eight".