28375901 has 2 divisors, whose sum is σ = 28375902. Its totient is φ = 28375900.

The previous prime is 28375889. The next prime is 28375909. The reversal of 28375901 is 10957382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25260676 + 3115225 = 5026^2 + 1765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28375901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28375909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14187950 + 14187951.

It is an arithmetic number, because the mean of its divisors is an integer number (14187951).

Almost surely, 2^28375901 is an apocalyptic number.

It is an amenable number.

28375901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28375901 is an equidigital number, since it uses as much as digits as its factorization.

28375901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 28375901 is about 5326.9035095447. The cubic root of 28375901 is about 305.0117383281.

The spelling of 28375901 in words is "twenty-eight million, three hundred seventy-five thousand, nine hundred one".