28523507 has 2 divisors, whose sum is σ = 28523508. Its totient is φ = 28523506.

The previous prime is 28523477. The next prime is 28523513. The reversal of 28523507 is 70532582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28523507 - 2¹⁴ = 28507123 is a prime.

It is not a weakly prime, because it can be changed into another prime (28523527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261753 + 14261754.

It is an arithmetic number, because the mean of its divisors is an integer number (14261754).

Almost surely, 2^28523507 is an apocalyptic number.

28523507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28523507 is an equidigital number, since it uses as much as digits as its factorization.

28523507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28523507 is about 5340.7403044896. The cubic root of 28523507 is about 305.5396948143.

The spelling of 28523507 in words is "twenty-eight million, five hundred twenty-three thousand, five hundred seven".