28671415 has 4 divisors (see below), whose sum is σ = 34405704. Its totient is φ = 22937128.

The previous prime is 28671353. The next prime is 28671421. The reversal of 28671415 is 51417682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51417682 = 2 ⋅25708841.

It is a cyclic number.

It is not a de Polignac number, because 28671415 - 2¹⁵ = 28638647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867137 + ... + 2867146.

It is an arithmetic number, because the mean of its divisors is an integer number (8601426).

Almost surely, 2^28671415 is an apocalyptic number.

28671415 is a deficient number, since it is larger than the sum of its proper divisors (5734289).

28671415 is an equidigital number, since it uses as much as digits as its factorization.

28671415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734288.

The product of its digits is 13440, while the sum is 34.

The square root of 28671415 is about 5354.5695438569. The cubic root of 28671415 is about 306.0669076358.

The spelling of 28671415 in words is "twenty-eight million, six hundred seventy-one thousand, four hundred fifteen".