276728685 has 8 divisors (see below), whose sum is σ = 442765920. Its totient is φ = 147588624.

The previous prime is 276728659. The next prime is 276728719. The reversal of 276728685 is 586827672.

276728685 = 5256² + 5257² + ... + 5265².

It is a happy number.

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

It is not a de Polignac number, because 276728685 - 2⁵ = 276728653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9224275 + ... + 9224304.

It is an arithmetic number, because the mean of its divisors is an integer number (55345740).

Almost surely, 2^276728685 is an apocalyptic number.

It is an amenable number.

276728685 is a deficient number, since it is larger than the sum of its proper divisors (166037235).

276728685 is a wasteful number, since it uses less digits than its factorization.

276728685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18448587.

The product of its digits is 2257920, while the sum is 51.

The square root of 276728685 is about 16635.1641110029. The cubic root of 276728685 is about 651.6554920613.

The spelling of 276728685 in words is "two hundred seventy-six million, seven hundred twenty-eight thousand, six hundred eighty-five".