275309680 has 20 divisors (see below), whose sum is σ = 640095192. Its totient is φ = 110123840.

The previous prime is 275309651. The next prime is 275309681. The reversal of 275309680 is 86903572.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275309681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1720606 + ... + 1720765.

Almost surely, 2^275309680 is an apocalyptic number.

275309680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275309680 is an abundant number, since it is smaller than the sum of its proper divisors (364785512).

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

275309680 is a wasteful number, since it uses less digits than its factorization.

275309680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441384 (or 3441378 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 275309680 is about 16592.4585278975. The cubic root of 275309680 is about 650.5397331634.

The spelling of 275309680 in words is "two hundred seventy-five million, three hundred nine thousand, six hundred eighty".