276428139 has 8 divisors (see below), whose sum is σ = 396922512. Its totient is φ = 170109600.

The previous prime is 276428129. The next prime is 276428153. The reversal of 276428139 is 931824672.

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

It is not a de Polignac number, because 276428139 - 2¹¹ = 276426091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 276428139.

It is not an unprimeable number, because it can be changed into a prime (276428129) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3543912 + ... + 3543989.

It is an arithmetic number, because the mean of its divisors is an integer number (49615314).

Almost surely, 2^276428139 is an apocalyptic number.

276428139 is a deficient number, since it is larger than the sum of its proper divisors (120494373).

276428139 is a wasteful number, since it uses less digits than its factorization.

276428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7087917.

The product of its digits is 145152, while the sum is 42.

The square root of 276428139 is about 16626.1282023206. The cubic root of 276428139 is about 651.4194926776.

It can be divided in two parts, 2764 and 28139, that added together give a palindrome (30903).

The spelling of 276428139 in words is "two hundred seventy-six million, four hundred twenty-eight thousand, one hundred thirty-nine".