26681642 has 8 divisors (see below), whose sum is σ = 43101156. Its totient is φ = 12314592.

The previous prime is 26681639. The next prime is 26681647. The reversal of 26681642 is 24618662.

It can be written as a sum of positive squares in 2 ways, for example, as 26204161 + 477481 = 5119^2 + 691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (26681647) 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 3 ways as a sum of consecutive naturals, for example, 513083 + ... + 513134.

Almost surely, 2^26681642 is an apocalyptic number.

26681642 is a deficient number, since it is larger than the sum of its proper divisors (16419514).

26681642 is a wasteful number, since it uses less digits than its factorization.

26681642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026232.

The product of its digits is 27648, while the sum is 35.

The square root of 26681642 is about 5165.4275718473. The cubic root of 26681642 is about 298.8162314132.

The spelling of 26681642 in words is "twenty-six million, six hundred eighty-one thousand, six hundred forty-two".