26815138 has 32 divisors (see below), whose sum is σ = 47589120. Its totient is φ = 11094720.

The previous prime is 26815109. The next prime is 26815141. The reversal of 26815138 is 83151862.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52428 + ... + 52936.

It is an arithmetic number, because the mean of its divisors is an integer number (1487160).

Almost surely, 2^26815138 is an apocalyptic number.

26815138 is a deficient number, since it is larger than the sum of its proper divisors (20773982).

26815138 is a wasteful number, since it uses less digits than its factorization.

26815138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 11520, while the sum is 34.

The square root of 26815138 is about 5178.3335157172. Note that the first 3 decimals coincide. The cubic root of 26815138 is about 299.3137573597.

The spelling of 26815138 in words is "twenty-six million, eight hundred fifteen thousand, one hundred thirty-eight".