28908827252021 has 2 divisors, whose sum is σ = 28908827252022. Its totient is φ = 28908827252020.

The previous prime is 28908827252003. The next prime is 28908827252101. The reversal of 28908827252021 is 12025272880982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27214104957796 + 1694722294225 = 5216714^2 + 1301815^2 .

It is a cyclic number.

It is not a de Polignac number, because 28908827252021 - 2²² = 28908823057717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28908827252821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14454413626010 + 14454413626011.

It is an arithmetic number, because the mean of its divisors is an integer number (14454413626011).

Almost surely, 2^{28908827252021} is an apocalyptic number.

It is an amenable number.

28908827252021 is a deficient number, since it is larger than the sum of its proper divisors (1).

28908827252021 is an equidigital number, since it uses as much as digits as its factorization.

28908827252021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 28908827252021 in words is "twenty-eight trillion, nine hundred eight billion, eight hundred twenty-seven million, two hundred fifty-two thousand, twenty-one".