26756640 has 144 divisors (see below), whose sum is σ = 96766488. Its totient is φ = 6709248.

The previous prime is 26756633. The next prime is 26756663. The reversal of 26756640 is 4665762.

26756640 is a `hidden beast` number, since 2 + 6 + 7 + 5 + 6 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26749584 + 7056 = 5172^2 + 84^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 26756595 and 26756604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23934 + ... + 25026.

Almost surely, 2^26756640 is an apocalyptic number.

26756640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26756640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48383244).

26756640 is an abundant number, since it is smaller than the sum of its proper divisors (70009848).

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

26756640 is a wasteful number, since it uses less digits than its factorization.

26756640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 26756640 is about 5172.6820895934. The cubic root of 26756640 is about 299.0959450186.

The spelling of 26756640 in words is "twenty-six million, seven hundred fifty-six thousand, six hundred forty".