27256640 has 56 divisors (see below), whose sum is σ = 68336160. Its totient is φ = 10326528.

The previous prime is 27256639. The next prime is 27256651. The reversal of 27256640 is 4665272.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 27256597 and 27256606.

It is a congruent number.

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, 3839 + ... + 8321.

Almost surely, 2^27256640 is an apocalyptic number.

27256640 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 27256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34168080).

27256640 is an abundant number, since it is smaller than the sum of its proper divisors (41079520).

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

27256640 is a wasteful number, since it uses less digits than its factorization.

27256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519 (or 4509 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 27256640 is about 5220.7892123701. The cubic root of 27256640 is about 300.9475227036.

The spelling of 27256640 in words is "twenty-seven million, two hundred fifty-six thousand, six hundred forty".