26640016 has 40 divisors (see below), whose sum is σ = 55940864. Its totient is φ = 12216960.

The previous prime is 26640013. The next prime is 26640017. The reversal of 26640016 is 61004662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26640013) 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, 43585 + ... + 44191.

Almost surely, 2^26640016 is an apocalyptic number.

26640016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26640016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27970432).

26640016 is an abundant number, since it is smaller than the sum of its proper divisors (29300848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26640016 is a wasteful number, since it uses less digits than its factorization.

26640016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 26640016 is about 5161.3967101939. The cubic root of 26640016 is about 298.6607562429.

Adding to 26640016 its reverse (61004662), we get a palindrome (87644678).

The spelling of 26640016 in words is "twenty-six million, six hundred forty thousand, sixteen".