28630769 has 2 divisors, whose sum is σ = 28630770. Its totient is φ = 28630768.

The previous prime is 28630757. The next prime is 28630783. The reversal of 28630769 is 96703682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 2211169 = 5140^2 + 1487^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630769 - 2²⁰ = 27582193 is a prime.

It is a super-2 number, since 2×28630769² = 1639441867062722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28630799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315384 + 14315385.

It is an arithmetic number, because the mean of its divisors is an integer number (14315385).

Almost surely, 2^28630769 is an apocalyptic number.

It is an amenable number.

28630769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630769 is an equidigital number, since it uses as much as digits as its factorization.

28630769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 28630769 is about 5350.7727479309. The cubic root of 28630769 is about 305.9222074310.

The spelling of 28630769 in words is "twenty-eight million, six hundred thirty thousand, seven hundred sixty-nine".