28481115 has 16 divisors (see below), whose sum is σ = 49075488. Its totient is φ = 14021376.

The previous prime is 28481113. The next prime is 28481119. The reversal of 28481115 is 51118482.

It is a happy number.

It is not a de Polignac number, because 28481115 - 2¹ = 28481113 is a prime.

It is a super-2 number, since 2×28481115² = 1622347823286450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28481113) 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, 72834 + ... + 73223.

It is an arithmetic number, because the mean of its divisors is an integer number (3067218).

Almost surely, 2^28481115 is an apocalyptic number.

28481115 is a deficient number, since it is larger than the sum of its proper divisors (20594373).

28481115 is a wasteful number, since it uses less digits than its factorization.

28481115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146078.

The product of its digits is 2560, while the sum is 30.

The square root of 28481115 is about 5336.7700906072. The cubic root of 28481115 is about 305.3882541010.

Adding to 28481115 its reverse (51118482), we get a palindrome (79599597).

The spelling of 28481115 in words is "twenty-eight million, four hundred eighty-one thousand, one hundred fifteen".