26138642 has 16 divisors (see below), whose sum is σ = 42604800. Its totient is φ = 11981520.

The previous prime is 26138633. The next prime is 26138653. The reversal of 26138642 is 24683162.

It is a junction number, because it is equal to n+sod(n) for n = 26138599 and 26138608.

It is an unprimeable number.

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, 9917 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (2662800).

Almost surely, 2^26138642 is an apocalyptic number.

26138642 is a deficient number, since it is larger than the sum of its proper divisors (16466158).

26138642 is a wasteful number, since it uses less digits than its factorization.

26138642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241.

The product of its digits is 13824, while the sum is 32.

The square root of 26138642 is about 5112.5964049590. The cubic root of 26138642 is about 296.7752459236.

The spelling of 26138642 in words is "twenty-six million, one hundred thirty-eight thousand, six hundred forty-two".