28071015 has 32 divisors (see below), whose sum is σ = 51964416. Its totient is φ = 12673920.

The previous prime is 28071013. The next prime is 28071059. The reversal of 28071015 is 51017082.

It is not a de Polignac number, because 28071015 - 2¹ = 28071013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071011) 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 31 ways as a sum of consecutive naturals, for example, 7105 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (1623888).

Almost surely, 2^28071015 is an apocalyptic number.

28071015 is a deficient number, since it is larger than the sum of its proper divisors (23893401).

28071015 is a wasteful number, since it uses less digits than its factorization.

28071015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28071015 is about 5298.2086595377. The cubic root of 28071015 is about 303.9153987516.

Adding to 28071015 its reverse (51017082), we get a palindrome (79088097).

The spelling of 28071015 in words is "twenty-eight million, seventy-one thousand, fifteen".