26138930 has 16 divisors (see below), whose sum is σ = 47352600. Its totient is φ = 10388352.

The previous prime is 26138929. The next prime is 26138939. The reversal of 26138930 is 3983162.

It can be written as a sum of positive squares in 4 ways, for example, as 21631801 + 4507129 = 4651^2 + 2123^2 .

It is not an unprimeable number, because it can be changed into a prime (26138939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6755 + ... + 9894.

Almost surely, 2^26138930 is an apocalyptic number.

26138930 is a deficient number, since it is larger than the sum of its proper divisors (21213670).

26138930 is a wasteful number, since it uses less digits than its factorization.

26138930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16813.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 26138930 is about 5112.6245706095. The cubic root of 26138930 is about 296.7763358930.

The spelling of 26138930 in words is "twenty-six million, one hundred thirty-eight thousand, nine hundred thirty".