28140315 has 16 divisors (see below), whose sum is σ = 51456768. Its totient is φ = 12864096.

The previous prime is 28140269. The next prime is 28140319. The reversal of 28140315 is 51304182.

It is not a de Polignac number, because 28140315 - 2⁷ = 28140187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28140319) 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, 133897 + ... + 134106.

It is an arithmetic number, because the mean of its divisors is an integer number (3216048).

Almost surely, 2^28140315 is an apocalyptic number.

28140315 is a deficient number, since it is larger than the sum of its proper divisors (23316453).

28140315 is a wasteful number, since it uses less digits than its factorization.

28140315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268018.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28140315 is about 5304.7445744352. The cubic root of 28140315 is about 304.1652891245.

Adding to 28140315 its reverse (51304182), we get a palindrome (79444497).

The spelling of 28140315 in words is "twenty-eight million, one hundred forty thousand, three hundred fifteen".