28731671515 has 8 divisors (see below), whose sum is σ = 34488401328. Its totient is φ = 22978406880.

The previous prime is 28731671483. The next prime is 28731671533. The reversal of 28731671515 is 51517613782.

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

It is not a de Polignac number, because 28731671515 - 2⁵ = 28731671483 is a prime.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 848016 + ... + 881245.

It is an arithmetic number, because the mean of its divisors is an integer number (4311050166).

Almost surely, 2^28731671515 is an apocalyptic number.

28731671515 is a deficient number, since it is larger than the sum of its proper divisors (5756729813).

28731671515 is a wasteful number, since it uses less digits than its factorization.

28731671515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732589.

The product of its digits is 352800, while the sum is 46.

The spelling of 28731671515 in words is "twenty-eight billion, seven hundred thirty-one million, six hundred seventy-one thousand, five hundred fifteen".