28406029 has 2 divisors, whose sum is σ = 28406030. Its totient is φ = 28406028.

The previous prime is 28406017. The next prime is 28406069. The reversal of 28406029 is 92060482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26245129 + 2160900 = 5123^2 + 1470^2 .

It is a cyclic number.

It is not a de Polignac number, because 28406029 - 2²³ = 20017421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28406069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203014 + 14203015.

It is an arithmetic number, because the mean of its divisors is an integer number (14203015).

Almost surely, 2^28406029 is an apocalyptic number.

It is an amenable number.

28406029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28406029 is an equidigital number, since it uses as much as digits as its factorization.

28406029 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 31.

The square root of 28406029 is about 5329.7306686173. The cubic root of 28406029 is about 305.1196484793.

It can be divided in two parts, 284060 and 29, that added together give a square (284089 = 533²).

The spelling of 28406029 in words is "twenty-eight million, four hundred six thousand, twenty-nine".