28735669 has 2 divisors, whose sum is σ = 28735670. Its totient is φ = 28735668.

The previous prime is 28735649. The next prime is 28735691. The reversal of 28735669 is 96653782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18173169 + 10562500 = 4263^2 + 3250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28735669 is a prime.

It is a super-2 number, since 2×28735669² = 1651477345755122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28735639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14367834 + 14367835.

It is an arithmetic number, because the mean of its divisors is an integer number (14367835).

Almost surely, 2^28735669 is an apocalyptic number.

It is an amenable number.

28735669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28735669 is an equidigital number, since it uses as much as digits as its factorization.

28735669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 28735669 is about 5360.5661081643. The cubic root of 28735669 is about 306.2953738685.

The spelling of 28735669 in words is "twenty-eight million, seven hundred thirty-five thousand, six hundred sixty-nine".