28461312015 has 16 divisors (see below), whose sum is σ = 45573734400. Its totient is φ = 15167488032.

The previous prime is 28461312007. The next prime is 28461312023. The reversal of 28461312015 is 51021316482.

It is an interprime number because it is at equal distance from previous prime (28461312007) and next prime (28461312023).

It is not a de Polignac number, because 28461312015 - 2³ = 28461312007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722575 + ... + 760944.

It is an arithmetic number, because the mean of its divisors is an integer number (2848358400).

Almost surely, 2^28461312015 is an apocalyptic number.

28461312015 is a deficient number, since it is larger than the sum of its proper divisors (17112422385).

28461312015 is a wasteful number, since it uses less digits than its factorization.

28461312015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484806.

The product of its (nonzero) digits is 11520, while the sum is 33.

Adding to 28461312015 its reverse (51021316482), we get a palindrome (79482628497).

The spelling of 28461312015 in words is "twenty-eight billion, four hundred sixty-one million, three hundred twelve thousand, fifteen".