28528814623 has 2 divisors, whose sum is σ = 28528814624. Its totient is φ = 28528814622.

The previous prime is 28528814581. The next prime is 28528814647. The reversal of 28528814623 is 32641882582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28528814623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28528814663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14264407311 + 14264407312.

It is an arithmetic number, because the mean of its divisors is an integer number (14264407312).

Almost surely, 2^28528814623 is an apocalyptic number.

28528814623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28528814623 is an equidigital number, since it uses as much as digits as its factorization.

28528814623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1474560, while the sum is 49.

The spelling of 28528814623 in words is "twenty-eight billion, five hundred twenty-eight million, eight hundred fourteen thousand, six hundred twenty-three".