26028638 has 4 divisors (see below), whose sum is σ = 39042960. Its totient is φ = 13014318.

The previous prime is 26028637. The next prime is 26028641. The reversal of 26028638 is 83682062.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×26028638² = 1354979992270088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26028598 and 26028607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26028637) 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, 6507158 + ... + 6507161.

It is an arithmetic number, because the mean of its divisors is an integer number (9760740).

Almost surely, 2^26028638 is an apocalyptic number.

26028638 is a deficient number, since it is larger than the sum of its proper divisors (13014322).

26028638 is a wasteful number, since it uses less digits than its factorization.

26028638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13014321.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 26028638 is about 5101.8269276799. The cubic root of 26028638 is about 296.3583361127.

The spelling of 26028638 in words is "twenty-six million, twenty-eight thousand, six hundred thirty-eight".