28418513 has 2 divisors, whose sum is σ = 28418514. Its totient is φ = 28418512.

The previous prime is 28418491. The next prime is 28418569. The reversal of 28418513 is 31581482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 10837264 = 4193^2 + 3292^2 .

It is a cyclic number.

It is not a de Polignac number, because 28418513 - 2¹⁶ = 28352977 is a prime.

It is a super-2 number, since 2×28418513² = 1615223762262338, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28418513.

It is not a weakly prime, because it can be changed into another prime (28418573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14209256 + 14209257.

It is an arithmetic number, because the mean of its divisors is an integer number (14209257).

Almost surely, 2^28418513 is an apocalyptic number.

It is an amenable number.

28418513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28418513 is an equidigital number, since it uses as much as digits as its factorization.

28418513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 28418513 is about 5330.9017060906. The cubic root of 28418513 is about 305.1643403511.

Adding to 28418513 its reverse (31581482), we get a palindrome (59999995).

The spelling of 28418513 in words is "twenty-eight million, four hundred eighteen thousand, five hundred thirteen".