28638683923 has 2 divisors, whose sum is σ = 28638683924. Its totient is φ = 28638683922.

The previous prime is 28638683893. The next prime is 28638683951. The reversal of 28638683923 is 32938683682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28638683923 - 2⁵ = 28638683891 is a prime.

It is not a weakly prime, because it can be changed into another prime (28638683023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14319341961 + 14319341962.

It is an arithmetic number, because the mean of its divisors is an integer number (14319341962).

Almost surely, 2^28638683923 is an apocalyptic number.

28638683923 is a deficient number, since it is larger than the sum of its proper divisors (1).

28638683923 is an equidigital number, since it uses as much as digits as its factorization.

28638683923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 58.

The spelling of 28638683923 in words is "twenty-eight billion, six hundred thirty-eight million, six hundred eighty-three thousand, nine hundred twenty-three".