1028647 has 2 divisors, whose sum is σ = 1028648. Its totient is φ = 1028646.

The previous prime is 1028617. The next prime is 1028663. The reversal of 1028647 is 7468201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1028647 - 2¹⁹ = 504359 is a prime.

It is a super-2 number, since 2×1028647² = 2116229301218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514323 + 514324.

It is an arithmetic number, because the mean of its divisors is an integer number (514324).

2^1028647 is an apocalyptic number.

1028647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028647 is an equidigital number, since it uses as much as digits as its factorization.

1028647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1028647 is about 1014.2223622066. Note that the first 3 decimals coincide. The cubic root of 1028647 is about 100.9459240638.

The spelling of 1028647 in words is "one million, twenty-eight thousand, six hundred forty-seven".