26428645 has 4 divisors (see below), whose sum is σ = 31714380. Its totient is φ = 21142912.

The previous prime is 26428643. The next prime is 26428651. The reversal of 26428645 is 54682462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54682462 = 2 ⋅27341231.

It can be written as a sum of positive squares in 2 ways, for example, as 16499844 + 9928801 = 4062^2 + 3151^2 .

It is a cyclic number.

It is not a de Polignac number, because 26428645 - 2¹ = 26428643 is a prime.

It is a magnanimous 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642860 + ... + 2642869.

It is an arithmetic number, because the mean of its divisors is an integer number (7928595).

Almost surely, 2^26428645 is an apocalyptic number.

It is an amenable number.

26428645 is a deficient number, since it is larger than the sum of its proper divisors (5285735).

26428645 is an equidigital number, since it uses as much as digits as its factorization.

26428645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285734.

The product of its digits is 92160, while the sum is 37.

The square root of 26428645 is about 5140.8797885187. The cubic root of 26428645 is about 297.8687656915.

The spelling of 26428645 in words is "twenty-six million, four hundred twenty-eight thousand, six hundred forty-five".