28736623 has 2 divisors, whose sum is σ = 28736624. Its totient is φ = 28736622.

The previous prime is 28736581. The next prime is 28736627. The reversal of 28736623 is 32663782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28736623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28736627) 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, 14368311 + 14368312.

It is an arithmetic number, because the mean of its divisors is an integer number (14368312).

Almost surely, 2^28736623 is an apocalyptic number.

28736623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28736623 is an equidigital number, since it uses as much as digits as its factorization.

28736623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 28736623 is about 5360.6550905650. The cubic root of 28736623 is about 306.2987634138.

The spelling of 28736623 in words is "twenty-eight million, seven hundred thirty-six thousand, six hundred twenty-three".