28702017 has 12 divisors (see below), whose sum is σ = 41623140. Its totient is φ = 19058688.

The previous prime is 28701997. The next prime is 28702033. The reversal of 28702017 is 71020782.

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 13771521 = 3864^2 + 3711^2 .

It is not a de Polignac number, because 28702017 - 2⁷ = 28701889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28702087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3892 + ... + 8517.

It is an arithmetic number, because the mean of its divisors is an integer number (3468595).

Almost surely, 2^28702017 is an apocalyptic number.

It is an amenable number.

28702017 is a deficient number, since it is larger than the sum of its proper divisors (12921123).

28702017 is a wasteful number, since it uses less digits than its factorization.

28702017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672 (or 12669 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 28702017 is about 5357.4263410709. The cubic root of 28702017 is about 306.1757608748.

Adding to 28702017 its reverse (71020782), we get a palindrome (99722799).

The spelling of 28702017 in words is "twenty-eight million, seven hundred two thousand, seventeen".