26640044 has 6 divisors (see below), whose sum is σ = 46620084. Its totient is φ = 13320020.

The previous prime is 26640041. The next prime is 26640073. The reversal of 26640044 is 44004662.

It is a junction number, because it is equal to n+sod(n) for n = 26639995 and 26640022.

It is not an unprimeable number, because it can be changed into a prime (26640041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330002 + ... + 3330009.

It is an arithmetic number, because the mean of its divisors is an integer number (7770014).

Almost surely, 2^26640044 is an apocalyptic number.

It is an amenable number.

26640044 is a deficient number, since it is larger than the sum of its proper divisors (19980040).

26640044 is a wasteful number, since it uses less digits than its factorization.

26640044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660015 (or 6660013 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 26640044 is about 5161.3994226372. The cubic root of 26640044 is about 298.6608608787.

The spelling of 26640044 in words is "twenty-six million, six hundred forty thousand, forty-four".