26191138 has 4 divisors (see below), whose sum is σ = 39286710. Its totient is φ = 13095568.

The previous prime is 26191129. The next prime is 26191183. The reversal of 26191138 is 83119162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22439169 + 3751969 = 4737^2 + 1937^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6547783 + ... + 6547786.

Almost surely, 2^26191138 is an apocalyptic number.

26191138 is a deficient number, since it is larger than the sum of its proper divisors (13095572).

26191138 is a wasteful number, since it uses less digits than its factorization.

26191138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095571.

The product of its digits is 2592, while the sum is 31.

The square root of 26191138 is about 5117.7278161309. The cubic root of 26191138 is about 296.9737909887.

The spelling of 26191138 in words is "twenty-six million, one hundred ninety-one thousand, one hundred thirty-eight".