28368629 has 2 divisors, whose sum is σ = 28368630. Its totient is φ = 28368628.

The previous prime is 28368601. The next prime is 28368643. The reversal of 28368629 is 92686382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23746129 + 4622500 = 4873^2 + 2150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28368629 is a prime.

It is a super-2 number, since 2×28368629² = 1609558222679282, 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 28368629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28368029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14184314 + 14184315.

It is an arithmetic number, because the mean of its divisors is an integer number (14184315).

Almost surely, 2^28368629 is an apocalyptic number.

It is an amenable number.

28368629 is a deficient number, since it is larger than the sum of its proper divisors (1).

28368629 is an equidigital number, since it uses as much as digits as its factorization.

28368629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 28368629 is about 5326.2208929033. The cubic root of 28368629 is about 304.9856805962.

The spelling of 28368629 in words is "twenty-eight million, three hundred sixty-eight thousand, six hundred twenty-nine".