28646957 has 2 divisors, whose sum is σ = 28646958. Its totient is φ = 28646956.

The previous prime is 28646951. The next prime is 28646971. The reversal of 28646957 is 75964682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27604516 + 1042441 = 5254^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 28646957 - 2¹⁴ = 28630573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28646951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323478 + 14323479.

It is an arithmetic number, because the mean of its divisors is an integer number (14323479).

Almost surely, 2^28646957 is an apocalyptic number.

It is an amenable number.

28646957 is a deficient number, since it is larger than the sum of its proper divisors (1).

28646957 is an equidigital number, since it uses as much as digits as its factorization.

28646957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 28646957 is about 5352.2852128787. The cubic root of 28646957 is about 305.9798532879.

The spelling of 28646957 in words is "twenty-eight million, six hundred forty-six thousand, nine hundred fifty-seven".