28006357207 has 2 divisors, whose sum is σ = 28006357208. Its totient is φ = 28006357206.

The previous prime is 28006357199. The next prime is 28006357231. The reversal of 28006357207 is 70275360082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28006357207 - 2³ = 28006357199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28006357207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28006357507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14003178603 + 14003178604.

It is an arithmetic number, because the mean of its divisors is an integer number (14003178604).

Almost surely, 2^28006357207 is an apocalyptic number.

28006357207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28006357207 is an equidigital number, since it uses as much as digits as its factorization.

28006357207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 28006357207 in words is "twenty-eight billion, six million, three hundred fifty-seven thousand, two hundred seven".