26648709 has 16 divisors (see below), whose sum is σ = 37009920. Its totient is φ = 17035200.

The previous prime is 26648701. The next prime is 26648711. The reversal of 26648709 is 90784662.

It is not a de Polignac number, because 26648709 - 2³ = 26648701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26648701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12684 + ... + 14634.

It is an arithmetic number, because the mean of its divisors is an integer number (2313120).

Almost surely, 2^26648709 is an apocalyptic number.

26648709 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

26648709 is a deficient number, since it is larger than the sum of its proper divisors (10361211).

26648709 is a wasteful number, since it uses less digits than its factorization.

26648709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 26648709 is about 5162.2387585233. The cubic root of 26648709 is about 298.6932384006.

The spelling of 26648709 in words is "twenty-six million, six hundred forty-eight thousand, seven hundred nine".