28734929 has 2 divisors, whose sum is σ = 28734930. Its totient is φ = 28734928.

The previous prime is 28734919. The next prime is 28734931. The reversal of 28734929 is 92943782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 5329 = 5360^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 28734929 - 2¹⁶ = 28669393 is a prime.

It is a super-2 number, since 2×28734929² = 1651392289270082, which contains 22 as substring.

Together with 28734931, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28734929.

It is not a weakly prime, because it can be changed into another prime (28734919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14367464 + 14367465.

It is an arithmetic number, because the mean of its divisors is an integer number (14367465).

Almost surely, 2^28734929 is an apocalyptic number.

It is an amenable number.

28734929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28734929 is an equidigital number, since it uses as much as digits as its factorization.

28734929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 28734929 is about 5360.4970851592. The cubic root of 28734929 is about 306.2927446098.

The spelling of 28734929 in words is "twenty-eight million, seven hundred thirty-four thousand, nine hundred twenty-nine".