26505138 has 16 divisors (see below), whose sum is σ = 57829536. Its totient is φ = 8031840.

The previous prime is 26505119. The next prime is 26505139. The reversal of 26505138 is 83150562.

It is not an unprimeable number, because it can be changed into a prime (26505139) 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, 200731 + ... + 200862.

It is an arithmetic number, because the mean of its divisors is an integer number (3614346).

Almost surely, 2^26505138 is an apocalyptic number.

26505138 is an abundant number, since it is smaller than the sum of its proper divisors (31324398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26505138 is a wasteful number, since it uses less digits than its factorization.

26505138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401609.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 26505138 is about 5148.3140929823. The cubic root of 26505138 is about 298.1558648916.

The spelling of 26505138 in words is "twenty-six million, five hundred five thousand, one hundred thirty-eight".