26865680 has 20 divisors (see below), whose sum is σ = 62462892. Its totient is φ = 10746240.

The previous prime is 26865653. The next prime is 26865691. The reversal of 26865680 is 8656862.

It can be written as a sum of positive squares in 2 ways, for example, as 5779216 + 21086464 = 2404^2 + 4592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 167831 + ... + 167990.

Almost surely, 2^26865680 is an apocalyptic number.

26865680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26865680 is an abundant number, since it is smaller than the sum of its proper divisors (35597212).

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

26865680 is a wasteful number, since it uses less digits than its factorization.

26865680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335834 (or 335828 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 26865680 is about 5183.2113597653. The cubic root of 26865680 is about 299.5016912715.

The spelling of 26865680 in words is "twenty-six million, eight hundred sixty-five thousand, six hundred eighty".