26742649 has 8 divisors (see below), whose sum is σ = 28430568. Its totient is φ = 25067520.

The previous prime is 26742637. The next prime is 26742673. The reversal of 26742649 is 94624762.

It can be written as a sum of positive squares in 4 ways, for example, as 9809424 + 16933225 = 3132^2 + 4115^2 .

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

It is not a de Polignac number, because 26742649 - 2⁹ = 26742137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26742049) 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, 1309 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (3553821).

Almost surely, 2^26742649 is an apocalyptic number.

It is an amenable number.

26742649 is a deficient number, since it is larger than the sum of its proper divisors (1687919).

26742649 is a wasteful number, since it uses less digits than its factorization.

26742649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395.

The product of its digits is 145152, while the sum is 40.

The square root of 26742649 is about 5171.3295195723. The cubic root of 26742649 is about 299.0438036815.

The spelling of 26742649 in words is "twenty-six million, seven hundred forty-two thousand, six hundred forty-nine".