26528139 has 12 divisors (see below), whose sum is σ = 41802072. Its totient is φ = 16077600.

The previous prime is 26528083. The next prime is 26528153. The reversal of 26528139 is 93182562.

It is not a de Polignac number, because 26528139 - 2¹⁶ = 26462603 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (26528639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133882 + ... + 134079.

It is an arithmetic number, because the mean of its divisors is an integer number (3483506).

Almost surely, 2^26528139 is an apocalyptic number.

26528139 is a deficient number, since it is larger than the sum of its proper divisors (15273933).

26528139 is a wasteful number, since it uses less digits than its factorization.

26528139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267978 (or 267975 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 26528139 is about 5150.5474466313. The cubic root of 26528139 is about 298.2420859136.

The spelling of 26528139 in words is "twenty-six million, five hundred twenty-eight thousand, one hundred thirty-nine".