276809285 has 16 divisors (see below), whose sum is σ = 338211840. Its totient is φ = 217451520.

The previous prime is 276809279. The next prime is 276809287. The reversal of 276809285 is 582908672.

It is not a de Polignac number, because 276809285 - 2¹² = 276805189 is a prime.

It is a super-2 number, since 2×276809285² = 153246760524422450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276809287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74420 + ... + 78050.

It is an arithmetic number, because the mean of its divisors is an integer number (21138240).

Almost surely, 2^276809285 is an apocalyptic number.

It is an amenable number.

276809285 is a deficient number, since it is larger than the sum of its proper divisors (61402555).

276809285 is a wasteful number, since it uses less digits than its factorization.

276809285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 276809285 is about 16637.5865136744. The cubic root of 276809285 is about 651.7187529819.

The spelling of 276809285 in words is "two hundred seventy-six million, eight hundred nine thousand, two hundred eighty-five".