26320139 has 8 divisors (see below), whose sum is σ = 27312960. Its totient is φ = 25333056.

The previous prime is 26320117. The next prime is 26320153. The reversal of 26320139 is 93102362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26320139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26320159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9407 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (3414120).

Almost surely, 2^26320139 is an apocalyptic number.

26320139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26320139 is a deficient number, since it is larger than the sum of its proper divisors (992821).

26320139 is a wasteful number, since it uses less digits than its factorization.

26320139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 26320139 is about 5130.3156822948. The cubic root of 26320139 is about 297.4605611161.

It can be divided in two parts, 263 and 20139, that added together give a palindrome (20402).

The spelling of 26320139 in words is "twenty-six million, three hundred twenty thousand, one hundred thirty-nine".