272665305 has 64 divisors (see below), whose sum is σ = 545955840. Its totient is φ = 127915200.

The previous prime is 272665291. The next prime is 272665307. The reversal of 272665305 is 503566272.

It is a happy number.

It is not a de Polignac number, because 272665305 - 2⁵ = 272665273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 272665305.

It is not an unprimeable number, because it can be changed into a prime (272665307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43074 + ... + 48996.

It is an arithmetic number, because the mean of its divisors is an integer number (8530560).

Almost surely, 2^272665305 is an apocalyptic number.

It is an amenable number.

272665305 is an abundant number, since it is smaller than the sum of its proper divisors (273290535).

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

272665305 is a wasteful number, since it uses less digits than its factorization.

272665305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979 (or 5973 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 272665305 is about 16512.5802041958. The cubic root of 272665305 is about 648.4501972701.

The spelling of 272665305 in words is "two hundred seventy-two million, six hundred sixty-five thousand, three hundred five".