26578642 has 4 divisors (see below), whose sum is σ = 39867966. Its totient is φ = 13289320.

The previous prime is 26578631. The next prime is 26578661. The reversal of 26578642 is 24687562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16900321 + 9678321 = 4111^2 + 3111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26578595 and 26578604.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6644659 + ... + 6644662.

Almost surely, 2^26578642 is an apocalyptic number.

26578642 is a deficient number, since it is larger than the sum of its proper divisors (13289324).

26578642 is a wasteful number, since it uses less digits than its factorization.

26578642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13289323.

The product of its digits is 161280, while the sum is 40.

The square root of 26578642 is about 5155.4477982034. The cubic root of 26578642 is about 298.4312256039.

The spelling of 26578642 in words is "twenty-six million, five hundred seventy-eight thousand, six hundred forty-two".