273305840 has 20 divisors (see below), whose sum is σ = 635436264. Its totient is φ = 109322304.

The previous prime is 273305819. The next prime is 273305843. The reversal of 273305840 is 48503372.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 273305797 and 273305806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273305843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708082 + ... + 1708241.

Almost surely, 2^273305840 is an apocalyptic number.

273305840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

273305840 is an abundant number, since it is smaller than the sum of its proper divisors (362130424).

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

273305840 is a wasteful number, since it uses less digits than its factorization.

273305840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416336 (or 3416330 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 273305840 is about 16531.9641906218. The cubic root of 273305840 is about 648.9575717177.

The spelling of 273305840 in words is "two hundred seventy-three million, three hundred five thousand, eight hundred forty".