26000138 has 4 divisors (see below), whose sum is σ = 39000210. Its totient is φ = 13000068.

The previous prime is 26000131. The next prime is 26000141. The reversal of 26000138 is 83100062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83100062 = 2 ⋅41550031.

It can be written as a sum of positive squares in only one way, i.e., 24870169 + 1129969 = 4987^2 + 1063^2 .

It is not an unprimeable number, because it can be changed into a prime (26000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6500033 + ... + 6500036.

Almost surely, 2^26000138 is an apocalyptic number.

26000138 is a deficient number, since it is larger than the sum of its proper divisors (13000072).

26000138 is a wasteful number, since it uses less digits than its factorization.

26000138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13000071.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 26000138 is about 5099.0330455882. The cubic root of 26000138 is about 296.2501309737.

The spelling of 26000138 in words is "twenty-six million, one hundred thirty-eight", and thus it is an aban number.