28731213782 has 8 divisors (see below), whose sum is σ = 43101801000. Its totient is φ = 14363946784.

The previous prime is 28731213781. The next prime is 28731213799.

28731213782 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731213781) 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 3 ways as a sum of consecutive naturals, for example, 808307 + ... + 843102.

It is an arithmetic number, because the mean of its divisors is an integer number (5387725125).

Almost surely, 2^28731213782 is an apocalyptic number.

28731213782 is a deficient number, since it is larger than the sum of its proper divisors (14370587218).

28731213782 is a wasteful number, since it uses less digits than its factorization.

28731213782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660110.

The product of its digits is 225792, while the sum is 44.

The spelling of 28731213782 in words is "twenty-eight billion, seven hundred thirty-one million, two hundred thirteen thousand, seven hundred eighty-two".