28261115 has 8 divisors (see below), whose sum is σ = 33974640. Its totient is φ = 22568032.

The previous prime is 28261087. The next prime is 28261133. The reversal of 28261115 is 51116282.

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 28261115 - 2¹⁶ = 28195579 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (4246830).

Almost surely, 2^28261115 is an apocalyptic number.

28261115 is a deficient number, since it is larger than the sum of its proper divisors (5713525).

28261115 is an equidigital number, since it uses as much as digits as its factorization.

28261115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221.

The product of its digits is 960, while the sum is 26.

The square root of 28261115 is about 5316.1184147835. The cubic root of 28261115 is about 304.5999053831.

Adding to 28261115 its reverse (51116282), we get a palindrome (79377397).

The spelling of 28261115 in words is "twenty-eight million, two hundred sixty-one thousand, one hundred fifteen".