26639139 has 16 divisors (see below), whose sum is σ = 37048320. Its totient is φ = 17004960.

The previous prime is 26639111. The next prime is 26639143. The reversal of 26639139 is 93193662.

It is not a de Polignac number, because 26639139 - 2¹² = 26635043 is a prime.

It is a super-2 number, since 2×26639139² = 1419287453322642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26639097 and 26639106.

It is not an unprimeable number, because it can be changed into a prime (26639189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9844 + ... + 12254.

It is an arithmetic number, because the mean of its divisors is an integer number (2315520).

Almost surely, 2^26639139 is an apocalyptic number.

26639139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26639139 is a deficient number, since it is larger than the sum of its proper divisors (10409181).

26639139 is a wasteful number, since it uses less digits than its factorization.

26639139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570.

The product of its digits is 52488, while the sum is 39.

The square root of 26639139 is about 5161.3117518708. The cubic root of 26639139 is about 298.6574788630.

The spelling of 26639139 in words is "twenty-six million, six hundred thirty-nine thousand, one hundred thirty-nine".