26690139 has 24 divisors (see below), whose sum is σ = 45138912. Its totient is φ = 14878080.

The previous prime is 26690129. The next prime is 26690161. The reversal of 26690139 is 93109662.

It is not a de Polignac number, because 26690139 - 2⁷ = 26690011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26690129) 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 23 ways as a sum of consecutive naturals, for example, 2584 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (1880788).

Almost surely, 2^26690139 is an apocalyptic number.

26690139 is a deficient number, since it is larger than the sum of its proper divisors (18448773).

26690139 is a wasteful number, since it uses less digits than its factorization.

26690139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387 (or 10384 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 26690139 is about 5166.2499939511. The cubic root of 26690139 is about 298.8479482523.

The spelling of 26690139 in words is "twenty-six million, six hundred ninety thousand, one hundred thirty-nine".