28132415 has 8 divisors (see below), whose sum is σ = 33797088. Its totient is φ = 22480480.

The previous prime is 28132393. The next prime is 28132417. The reversal of 28132415 is 51423182.

28132415 is nontrivially palindromic in base 14.

It is a Cunningham number, because it is equal to 5304²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28132415 - 2¹⁶ = 28066879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28132417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2654 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (4224636).

Almost surely, 2^28132415 is an apocalyptic number.

28132415 is a deficient number, since it is larger than the sum of its proper divisors (5664673).

28132415 is a wasteful number, since it uses less digits than its factorization.

28132415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369.

The product of its digits is 1920, while the sum is 26.

The square root of 28132415 is about 5303.9999057315. Note that the first 4 decimals coincide. The cubic root of 28132415 is about 304.1368230764.

Adding to 28132415 its reverse (51423182), we get a palindrome (79555597).

The spelling of 28132415 in words is "twenty-eight million, one hundred thirty-two thousand, four hundred fifteen".