26720556 has 12 divisors (see below), whose sum is σ = 62347992. Its totient is φ = 8906848.

The previous prime is 26720539. The next prime is 26720563. The reversal of 26720556 is 65502762.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×26720556² = 1427976225898272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113345 + ... + 1113368.

It is an arithmetic number, because the mean of its divisors is an integer number (5195666).

Almost surely, 2^26720556 is an apocalyptic number.

It is an amenable number.

26720556 is an abundant number, since it is smaller than the sum of its proper divisors (35627436).

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

26720556 is a wasteful number, since it uses less digits than its factorization.

26720556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226720 (or 2226718 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 26720556 is about 5169.1929737629. The cubic root of 26720556 is about 298.9614309523.

The spelling of 26720556 in words is "twenty-six million, seven hundred twenty thousand, five hundred fifty-six".