28070969 has 2 divisors, whose sum is σ = 28070970. Its totient is φ = 28070968.

The previous prime is 28070963. The next prime is 28070981. The reversal of 28070969 is 96907082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26915344 + 1155625 = 5188^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 28070969 - 2⁴ = 28070953 is a prime.

It is a super-2 number, since 2×28070969² = 1575958601197922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28070963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14035484 + 14035485.

It is an arithmetic number, because the mean of its divisors is an integer number (14035485).

Almost surely, 2^28070969 is an apocalyptic number.

It is an amenable number.

28070969 is a deficient number, since it is larger than the sum of its proper divisors (1).

28070969 is an equidigital number, since it uses as much as digits as its factorization.

28070969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 28070969 is about 5298.2043184460. The cubic root of 28070969 is about 303.9152327427.

The spelling of 28070969 in words is "twenty-eight million, seventy thousand, nine hundred sixty-nine".