26428647 has 16 divisors (see below), whose sum is σ = 41572352. Its totient is φ = 14614560.

The previous prime is 26428643. The next prime is 26428651. The reversal of 26428647 is 74682462.

It is an interprime number because it is at equal distance from previous prime (26428643) and next prime (26428651).

It is not a de Polignac number, because 26428647 - 2² = 26428643 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26428643) 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 in 15 ways as a sum of consecutive naturals, for example, 19648 + ... + 20949.

It is an arithmetic number, because the mean of its divisors is an integer number (2598272).

Almost surely, 2^26428647 is an apocalyptic number.

26428647 is a deficient number, since it is larger than the sum of its proper divisors (15143705).

26428647 is a wasteful number, since it uses less digits than its factorization.

26428647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40638.

The product of its digits is 129024, while the sum is 39.

The square root of 26428647 is about 5140.8799830379. The cubic root of 26428647 is about 297.8687732053.

The spelling of 26428647 in words is "twenty-six million, four hundred twenty-eight thousand, six hundred forty-seven".