28269401 has 2 divisors, whose sum is σ = 28269402. Its totient is φ = 28269400.

The previous prime is 28269379. The next prime is 28269491. The reversal of 28269401 is 10496282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27457600 + 811801 = 5240^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 28269401 - 2¹⁰ = 28268377 is a prime.

It is not a weakly prime, because it can be changed into another prime (28269491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134700 + 14134701.

It is an arithmetic number, because the mean of its divisors is an integer number (14134701).

Almost surely, 2^28269401 is an apocalyptic number.

It is an amenable number.

28269401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28269401 is an equidigital number, since it uses as much as digits as its factorization.

28269401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28269401 is about 5316.8976856810. The cubic root of 28269401 is about 304.6296714673.

The spelling of 28269401 in words is "twenty-eight million, two hundred sixty-nine thousand, four hundred one".