26720656 has 20 divisors (see below), whose sum is σ = 51897472. Its totient is φ = 13327776.

The previous prime is 26720653. The next prime is 26720671. The reversal of 26720656 is 65602762.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26720653) 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 3 ways as a sum of consecutive naturals, for example, 5605 + ... + 9211.

Almost surely, 2^26720656 is an apocalyptic number.

It is an amenable number.

26720656 is a deficient number, since it is larger than the sum of its proper divisors (25176816).

26720656 is a wasteful number, since it uses less digits than its factorization.

26720656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078 (or 4072 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 26720656 is about 5169.2026464436. The cubic root of 26720656 is about 298.9618039000.

The spelling of 26720656 in words is "twenty-six million, seven hundred twenty thousand, six hundred fifty-six".