28010817 has 6 divisors (see below), whose sum is σ = 40460082. Its totient is φ = 18673872.

The previous prime is 28010797. The next prime is 28010819. The reversal of 28010817 is 71801082.

It can be written as a sum of positive squares in only one way, i.e., 21538881 + 6471936 = 4641^2 + 2544^2 .

It is not a de Polignac number, because 28010817 - 2¹¹ = 28008769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28010819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1556148 + ... + 1556165.

It is an arithmetic number, because the mean of its divisors is an integer number (6743347).

Almost surely, 2^28010817 is an apocalyptic number.

It is an amenable number.

28010817 is a deficient number, since it is larger than the sum of its proper divisors (12449265).

28010817 is a wasteful number, since it uses less digits than its factorization.

28010817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112319 (or 3112316 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 28010817 is about 5292.5246338586. The cubic root of 28010817 is about 303.6979954662.

Adding to 28010817 its reverse (71801082), we get a palindrome (99811899).

The spelling of 28010817 in words is "twenty-eight million, ten thousand, eight hundred seventeen".