28338407 has 2 divisors, whose sum is σ = 28338408. Its totient is φ = 28338406.

The previous prime is 28338403. The next prime is 28338413. The reversal of 28338407 is 70483382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28338407 - 2² = 28338403 is a prime.

It is a super-2 number, since 2×28338407² = 1606130622595298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28338403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169203 + 14169204.

It is an arithmetic number, because the mean of its divisors is an integer number (14169204).

Almost surely, 2^28338407 is an apocalyptic number.

28338407 is a deficient number, since it is larger than the sum of its proper divisors (1).

28338407 is an equidigital number, since it uses as much as digits as its factorization.

28338407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28338407 is about 5323.3830408867. The cubic root of 28338407 is about 304.8773384749.

The spelling of 28338407 in words is "twenty-eight million, three hundred thirty-eight thousand, four hundred seven".