28651315 has 16 divisors (see below), whose sum is σ = 42865920. Its totient is φ = 17860320.

The previous prime is 28651309. The next prime is 28651319. The reversal of 28651315 is 51315682.

It is not a de Polignac number, because 28651315 - 2¹³ = 28643123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28651319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36825 + ... + 37594.

It is an arithmetic number, because the mean of its divisors is an integer number (2679120).

Almost surely, 2^28651315 is an apocalyptic number.

28651315 is a deficient number, since it is larger than the sum of its proper divisors (14214605).

28651315 is a wasteful number, since it uses less digits than its factorization.

28651315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74442.

The product of its digits is 7200, while the sum is 31.

The square root of 28651315 is about 5352.6923132196. The cubic root of 28651315 is about 305.9953685203.

Adding to 28651315 its reverse (51315682), we get a palindrome (79966997).

The spelling of 28651315 in words is "twenty-eight million, six hundred fifty-one thousand, three hundred fifteen".