28626427 has 2 divisors, whose sum is σ = 28626428. Its totient is φ = 28626426.

The previous prime is 28626401. The next prime is 28626443. The reversal of 28626427 is 72462682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28626427 is a prime.

It is not a weakly prime, because it can be changed into another prime (28626457) 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, 14313213 + 14313214.

It is an arithmetic number, because the mean of its divisors is an integer number (14313214).

Almost surely, 2^28626427 is an apocalyptic number.

28626427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28626427 is an equidigital number, since it uses as much as digits as its factorization.

28626427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 28626427 is about 5350.3669967583. The cubic root of 28626427 is about 305.9067417691.

The spelling of 28626427 in words is "twenty-eight million, six hundred twenty-six thousand, four hundred twenty-seven".