28638407029 has 2 divisors, whose sum is σ = 28638407030. Its totient is φ = 28638407028.

The previous prime is 28638407003. The next prime is 28638407051. The reversal of 28638407029 is 92070483682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28629316804 + 9090225 = 169202^2 + 3015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28638407029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28638407089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14319203514 + 14319203515.

It is an arithmetic number, because the mean of its divisors is an integer number (14319203515).

Almost surely, 2^28638407029 is an apocalyptic number.

It is an amenable number.

28638407029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28638407029 is an equidigital number, since it uses as much as digits as its factorization.

28638407029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 28638407029 in words is "twenty-eight billion, six hundred thirty-eight million, four hundred seven thousand, twenty-nine".