28129301 has 2 divisors, whose sum is σ = 28129302. Its totient is φ = 28129300.

The previous prime is 28129261. The next prime is 28129393. The reversal of 28129301 is 10392182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 2979076 = 5015^2 + 1726^2 .

It is a cyclic number.

It is not a de Polignac number, because 28129301 - 2¹⁸ = 27867157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28129201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064650 + 14064651.

It is an arithmetic number, because the mean of its divisors is an integer number (14064651).

Almost surely, 2^28129301 is an apocalyptic number.

It is an amenable number.

28129301 is a deficient number, since it is larger than the sum of its proper divisors (1).

28129301 is an equidigital number, since it uses as much as digits as its factorization.

28129301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 28129301 is about 5303.7063455663. The cubic root of 28129301 is about 304.1256009445.

The spelling of 28129301 in words is "twenty-eight million, one hundred twenty-nine thousand, three hundred one".