28934869 has 2 divisors, whose sum is σ = 28934870. Its totient is φ = 28934868.

The previous prime is 28934831. The next prime is 28934881. The reversal of 28934869 is 96843982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 97969 = 5370^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 28934869 - 2¹⁵ = 28902101 is a prime.

It is a super-2 number, since 2×28934869² = 1674453288094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28934669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14467434 + 14467435.

It is an arithmetic number, because the mean of its divisors is an integer number (14467435).

Almost surely, 2^28934869 is an apocalyptic number.

It is an amenable number.

28934869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28934869 is an equidigital number, since it uses as much as digits as its factorization.

28934869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 28934869 is about 5379.1141463999. The cubic root of 28934869 is about 307.0015066399.

The spelling of 28934869 in words is "twenty-eight million, nine hundred thirty-four thousand, eight hundred sixty-nine".