27550656 has 84 divisors (see below), whose sum is σ = 90263472. Its totient is φ = 7870464.

The previous prime is 27550651. The next prime is 27550669. The reversal of 27550656 is 65605572.

It is a tau number, because it is divible by the number of its divisors (84).

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

It is a self number, because there is not a number n which added to its sum of digits gives 27550656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27550651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616 + ... + 7448.

Almost surely, 2^27550656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27550656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45131736).

27550656 is an abundant number, since it is smaller than the sum of its proper divisors (62712816).

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

27550656 is a wasteful number, since it uses less digits than its factorization.

27550656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6858 (or 6845 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 27550656 is about 5248.8718787945. The cubic root of 27550656 is about 302.0257569073.

The spelling of 27550656 in words is "twenty-seven million, five hundred fifty thousand, six hundred fifty-six".