28703165 has 4 divisors (see below), whose sum is σ = 34443804. Its totient is φ = 22962528.

The previous prime is 28703141. The next prime is 28703177. The reversal of 28703165 is 56130782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56130782 = 2 ⋅28065391.

It can be written as a sum of positive squares in 2 ways, for example, as 17799961 + 10903204 = 4219^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 28703165 - 2⁸ = 28702909 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, 2870312 + ... + 2870321.

It is an arithmetic number, because the mean of its divisors is an integer number (8610951).

Almost surely, 2^28703165 is an apocalyptic number.

It is an amenable number.

28703165 is a deficient number, since it is larger than the sum of its proper divisors (5740639).

28703165 is an equidigital number, since it uses as much as digits as its factorization.

28703165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740638.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28703165 is about 5357.5334809966. The cubic root of 28703165 is about 306.1798428770.

The spelling of 28703165 in words is "twenty-eight million, seven hundred three thousand, one hundred sixty-five".