26650638 has 48 divisors (see below), whose sum is σ = 68130816. Its totient is φ = 7367760.

The previous prime is 26650633. The next prime is 26650639. The reversal of 26650638 is 83605662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26650633) 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 23 ways as a sum of consecutive naturals, for example, 495 + ... + 7317.

It is an arithmetic number, because the mean of its divisors is an integer number (1419392).

Almost surely, 2^26650638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26650638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34065408).

26650638 is an abundant number, since it is smaller than the sum of its proper divisors (41480178).

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

26650638 is a wasteful number, since it uses less digits than its factorization.

26650638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869 (or 6866 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 26650638 is about 5162.4255926841. The cubic root of 26650638 is about 298.7004453208.

The spelling of 26650638 in words is "twenty-six million, six hundred fifty thousand, six hundred thirty-eight".