28734869 has 2 divisors, whose sum is σ = 28734870. Its totient is φ = 28734868.

The previous prime is 28734863. The next prime is 28734887. The reversal of 28734869 is 96843782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26142769 + 2592100 = 5113^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 28734869 - 2¹² = 28730773 is a prime.

It is a super-2 number, since 2×28734869² = 1651385392894322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28734863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14367434 + 14367435.

It is an arithmetic number, because the mean of its divisors is an integer number (14367435).

Almost surely, 2^28734869 is an apocalyptic number.

It is an amenable number.

28734869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28734869 is an equidigital number, since it uses as much as digits as its factorization.

28734869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 28734869 is about 5360.4914886603. The cubic root of 28734869 is about 306.2925314247.

The spelling of 28734869 in words is "twenty-eight million, seven hundred thirty-four thousand, eight hundred sixty-nine".