28380783901 has 2 divisors, whose sum is σ = 28380783902. Its totient is φ = 28380783900.

The previous prime is 28380783889. The next prime is 28380783919. The reversal of 28380783901 is 10938708382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26820612900 + 1560171001 = 163770^2 + 39499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28380783901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28380783931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190391950 + 14190391951.

It is an arithmetic number, because the mean of its divisors is an integer number (14190391951).

Almost surely, 2^28380783901 is an apocalyptic number.

It is an amenable number.

28380783901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28380783901 is an equidigital number, since it uses as much as digits as its factorization.

28380783901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 28380783901 in words is "twenty-eight billion, three hundred eighty million, seven hundred eighty-three thousand, nine hundred one".