276609985 has 8 divisors (see below), whose sum is σ = 340028136. Its totient is φ = 215890560.

The previous prime is 276609959. The next prime is 276609989. The reversal of 276609985 is 589906672.

276609985 = 1796² + 1797² + ... + 1877².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3732624 + 272877361 = 1932^2 + 16519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 276609985 - 2⁷ = 276609857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276609989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674454 + ... + 674863.

It is an arithmetic number, because the mean of its divisors is an integer number (42503517).

Almost surely, 2^276609985 is an apocalyptic number.

It is an amenable number.

276609985 is a deficient number, since it is larger than the sum of its proper divisors (63418151).

276609985 is a wasteful number, since it uses less digits than its factorization.

276609985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349363.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 276609985 is about 16631.5959847514. The cubic root of 276609985 is about 651.5623050355.

The spelling of 276609985 in words is "two hundred seventy-six million, six hundred nine thousand, nine hundred eighty-five".