28646407 has 2 divisors, whose sum is σ = 28646408. Its totient is φ = 28646406.

The previous prime is 28646389. The next prime is 28646417. The reversal of 28646407 is 70464682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28646407 - 2¹¹ = 28644359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28646417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323203 + 14323204.

It is an arithmetic number, because the mean of its divisors is an integer number (14323204).

Almost surely, 2^28646407 is an apocalyptic number.

28646407 is a deficient number, since it is larger than the sum of its proper divisors (1).

28646407 is an equidigital number, since it uses as much as digits as its factorization.

28646407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 28646407 is about 5352.2338327095. The cubic root of 28646407 is about 305.9778950811.

The spelling of 28646407 in words is "twenty-eight million, six hundred forty-six thousand, four hundred seven".