28429207 has 2 divisors, whose sum is σ = 28429208. Its totient is φ = 28429206.

The previous prime is 28429171. The next prime is 28429213. The reversal of 28429207 is 70292482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28429207 - 2¹⁵ = 28396439 is a prime.

It is equal to p_1766455 and since 28429207 and 1766455 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28429217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14214603 + 14214604.

It is an arithmetic number, because the mean of its divisors is an integer number (14214604).

Almost surely, 2^28429207 is an apocalyptic number.

28429207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28429207 is an equidigital number, since it uses as much as digits as its factorization.

28429207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28429207 is about 5331.9046315552. The cubic root of 28429207 is about 305.2026137375.

The spelling of 28429207 in words is "twenty-eight million, four hundred twenty-nine thousand, two hundred seven".