28651015 has 8 divisors (see below), whose sum is σ = 34418880. Its totient is φ = 22895712.

The previous prime is 28651013. The next prime is 28651079. The reversal of 28651015 is 51015682.

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

It is a cyclic number.

It is not a de Polignac number, because 28651015 - 2¹ = 28651013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28651013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2962 + ... + 8128.

It is an arithmetic number, because the mean of its divisors is an integer number (4302360).

Almost surely, 2^28651015 is an apocalyptic number.

28651015 is a deficient number, since it is larger than the sum of its proper divisors (5767865).

28651015 is a wasteful number, since it uses less digits than its factorization.

28651015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 28651015 is about 5352.6642898654. The cubic root of 28651015 is about 305.9943005190.

Adding to 28651015 its reverse (51015682), we get a palindrome (79666697).

The spelling of 28651015 in words is "twenty-eight million, six hundred fifty-one thousand, fifteen".