26640002 has 4 divisors (see below), whose sum is σ = 39960006. Its totient is φ = 13320000.

The previous prime is 26640001. The next prime is 26640013. The reversal of 26640002 is 20004662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20004662 = 2 ⋅10002331.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 5193841 = 4631^2 + 2279^2 .

It is not an unprimeable number, because it can be changed into a prime (26640001) 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 as a sum of consecutive naturals, namely, 6659999 + ... + 6660002.

Almost surely, 2^26640002 is an apocalyptic number.

26640002 is a deficient number, since it is larger than the sum of its proper divisors (13320004).

26640002 is a wasteful number, since it uses less digits than its factorization.

26640002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13320003.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26640002 is about 5161.3953539716. The cubic root of 26640002 is about 298.6607039249.

Adding to 26640002 its reverse (20004662), we get a palindrome (46644664).

The spelling of 26640002 in words is "twenty-six million, six hundred forty thousand, two".