28332407 has 2 divisors, whose sum is σ = 28332408. Its totient is φ = 28332406.

The previous prime is 28332379. The next prime is 28332413. The reversal of 28332407 is 70423382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28332407 - 2¹⁶ = 28266871 is a prime.

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 28332407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28332427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14166203 + 14166204.

It is an arithmetic number, because the mean of its divisors is an integer number (14166204).

Almost surely, 2^28332407 is an apocalyptic number.

28332407 is a deficient number, since it is larger than the sum of its proper divisors (1).

28332407 is an equidigital number, since it uses as much as digits as its factorization.

28332407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28332407 is about 5322.8194596473. The cubic root of 28332407 is about 304.8558200559.

Adding to 28332407 its reverse (70423382), we get a palindrome (98755789).

The spelling of 28332407 in words is "twenty-eight million, three hundred thirty-two thousand, four hundred seven".