28312820407 has 2 divisors, whose sum is σ = 28312820408. Its totient is φ = 28312820406.

The previous prime is 28312820383. The next prime is 28312820479. The reversal of 28312820407 is 70402821382.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28312820407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28312220407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156410203 + 14156410204.

It is an arithmetic number, because the mean of its divisors is an integer number (14156410204).

Almost surely, 2^28312820407 is an apocalyptic number.

28312820407 is a deficient number, since it is larger than the sum of its proper divisors (1).

28312820407 is an equidigital number, since it uses as much as digits as its factorization.

28312820407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 28312820407 in words is "twenty-eight billion, three hundred twelve million, eight hundred twenty thousand, four hundred seven".