28370869 has 2 divisors, whose sum is σ = 28370870. Its totient is φ = 28370868.

The previous prime is 28370863. The next prime is 28370879. The reversal of 28370869 is 96807382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 3470769 = 4990^2 + 1863^2 .

It is a cyclic number.

It is not a de Polignac number, because 28370869 - 2³ = 28370861 is a prime.

It is a super-2 number, since 2×28370869² = 1609812415630322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28370861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14185434 + 14185435.

It is an arithmetic number, because the mean of its divisors is an integer number (14185435).

Almost surely, 2^28370869 is an apocalyptic number.

It is an amenable number.

28370869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28370869 is an equidigital number, since it uses as much as digits as its factorization.

28370869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28370869 is about 5326.4311691789. The cubic root of 28370869 is about 304.9937076548.

The spelling of 28370869 in words is "twenty-eight million, three hundred seventy thousand, eight hundred sixty-nine".