28031466515 has 16 divisors (see below), whose sum is σ = 38356180128. Its totient is φ = 19482502656.

The previous prime is 28031466473. The next prime is 28031466521. The reversal of 28031466515 is 51566413082.

It is not a de Polignac number, because 28031466515 - 2¹⁴ = 28031450131 is a prime.

It is a super-2 number, since 2×28031466515² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 12682817 + ... + 12685026.

It is an arithmetic number, because the mean of its divisors is an integer number (2397261258).

Almost surely, 2^28031466515 is an apocalyptic number.

28031466515 is a deficient number, since it is larger than the sum of its proper divisors (10324713613).

28031466515 is a wasteful number, since it uses less digits than its factorization.

28031466515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25367878.

The product of its (nonzero) digits is 172800, while the sum is 41.

Adding to 28031466515 its reverse (51566413082), we get a palindrome (79597879597).

The spelling of 28031466515 in words is "twenty-eight billion, thirty-one million, four hundred sixty-six thousand, five hundred fifteen".