28343507 has 2 divisors, whose sum is σ = 28343508. Its totient is φ = 28343506.

The previous prime is 28343489. The next prime is 28343537. The reversal of 28343507 is 70534382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28343507 - 2⁸ = 28343251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28343537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14171753 + 14171754.

It is an arithmetic number, because the mean of its divisors is an integer number (14171754).

Almost surely, 2^28343507 is an apocalyptic number.

28343507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28343507 is an equidigital number, since it uses as much as digits as its factorization.

28343507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28343507 is about 5323.8620380322. The cubic root of 28343507 is about 304.8956267431.

Adding to 28343507 its reverse (70534382), we get a palindrome (98877889).

The spelling of 28343507 in words is "twenty-eight million, three hundred forty-three thousand, five hundred seven".