28141415 has 4 divisors (see below), whose sum is σ = 33769704. Its totient is φ = 22513128.

The previous prime is 28141411. The next prime is 28141433. The reversal of 28141415 is 51414182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28141415 - 2² = 28141411 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 (28141411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2814137 + ... + 2814146.

It is an arithmetic number, because the mean of its divisors is an integer number (8442426).

Almost surely, 2^28141415 is an apocalyptic number.

28141415 is a deficient number, since it is larger than the sum of its proper divisors (5628289).

28141415 is an equidigital number, since it uses as much as digits as its factorization.

28141415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628288.

The product of its digits is 1280, while the sum is 26.

The square root of 28141415 is about 5304.8482541916. The cubic root of 28141415 is about 304.1692523289.

Adding to 28141415 its reverse (51414182), we get a palindrome (79555597).

The spelling of 28141415 in words is "twenty-eight million, one hundred forty-one thousand, four hundred fifteen".