276428728 has 8 divisors (see below), whose sum is σ = 518303880. Its totient is φ = 138214360.

The previous prime is 276428717. The next prime is 276428771. The reversal of 276428728 is 827824672.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17276788 + ... + 17276803.

It is an arithmetic number, because the mean of its divisors is an integer number (64787985).

Almost surely, 2^276428728 is an apocalyptic number.

It is an amenable number.

276428728 is a deficient number, since it is larger than the sum of its proper divisors (241875152).

276428728 is a wasteful number, since it uses less digits than its factorization.

276428728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34553597 (or 34553593 counting only the distinct ones).

The product of its digits is 602112, while the sum is 46.

The square root of 276428728 is about 16626.1459153948. The cubic root of 276428728 is about 651.4199553485.

The spelling of 276428728 in words is "two hundred seventy-six million, four hundred twenty-eight thousand, seven hundred twenty-eight".