26138634 has 16 divisors (see below), whose sum is σ = 52370688. Its totient is φ = 8697312.

The previous prime is 26138633. The next prime is 26138653. The reversal of 26138634 is 43683162.

It is a junction number, because it is equal to n+sod(n) for n = 26138595 and 26138604.

It is not an unprimeable number, because it can be changed into a prime (26138633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 7230.

It is an arithmetic number, because the mean of its divisors is an integer number (3273168).

Almost surely, 2^26138634 is an apocalyptic number.

26138634 is an abundant number, since it is smaller than the sum of its proper divisors (26232054).

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

26138634 is a wasteful number, since it uses less digits than its factorization.

26138634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7789.

The product of its digits is 20736, while the sum is 33.

The square root of 26138634 is about 5112.5956225776. The cubic root of 26138634 is about 296.7752156466.

The spelling of 26138634 in words is "twenty-six million, one hundred thirty-eight thousand, six hundred thirty-four".