28512623 has 2 divisors, whose sum is σ = 28512624. Its totient is φ = 28512622.

The previous prime is 28512599. The next prime is 28512637. The reversal of 28512623 is 32621582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28512623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28512683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256311 + 14256312.

It is an arithmetic number, because the mean of its divisors is an integer number (14256312).

Almost surely, 2^28512623 is an apocalyptic number.

28512623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28512623 is an equidigital number, since it uses as much as digits as its factorization.

28512623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 28512623 is about 5339.7212474061. The cubic root of 28512623 is about 305.5008272572.

The spelling of 28512623 in words is "twenty-eight million, five hundred twelve thousand, six hundred twenty-three".