28329850631 has 2 divisors, whose sum is σ = 28329850632. Its totient is φ = 28329850630.

The previous prime is 28329850561. The next prime is 28329850639. The reversal of 28329850631 is 13605892382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28329850631 - 2²² = 28325656327 is a prime.

It is a super-2 number, since 2×28329850631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28329850639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14164925315 + 14164925316.

It is an arithmetic number, because the mean of its divisors is an integer number (14164925316).

Almost surely, 2^28329850631 is an apocalyptic number.

28329850631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28329850631 is an equidigital number, since it uses as much as digits as its factorization.

28329850631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 28329850631 in words is "twenty-eight billion, three hundred twenty-nine million, eight hundred fifty thousand, six hundred thirty-one".