28406930947211 has 2 divisors, whose sum is σ = 28406930947212. Its totient is φ = 28406930947210.

The previous prime is 28406930947193. The next prime is 28406930947247. The reversal of 28406930947211 is 11274903960482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28406930947211 - 2¹⁴ = 28406930930827 is a prime.

It is a super-2 number, since 2×28406930947211² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28406930947711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203465473605 + 14203465473606.

It is an arithmetic number, because the mean of its divisors is an integer number (14203465473606).

Almost surely, 2^{28406930947211} is an apocalyptic number.

28406930947211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28406930947211 is an equidigital number, since it uses as much as digits as its factorization.

28406930947211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 28406930947211 in words is "twenty-eight trillion, four hundred six billion, nine hundred thirty million, nine hundred forty-seven thousand, two hundred eleven".