26611980 has 24 divisors (see below), whose sum is σ = 74513712. Its totient is φ = 7096512.

The previous prime is 26611973. The next prime is 26611999. The reversal of 26611980 is 8911662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221707 + ... + 221826.

It is an arithmetic number, because the mean of its divisors is an integer number (3104738).

Almost surely, 2^26611980 is an apocalyptic number.

26611980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26611980 is an abundant number, since it is smaller than the sum of its proper divisors (47901732).

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

26611980 is a wasteful number, since it uses less digits than its factorization.

26611980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443545 (or 443543 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 26611980 is about 5158.6800637372. The cubic root of 26611980 is about 298.5559490983. Note that the first 3 decimals are identical.

It can be divided in two parts, 266 and 11980, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 26611980 in words is "twenty-six million, six hundred eleven thousand, nine hundred eighty".