56781648 has 200 divisors, whose sum is σ = 205254720. Its totient is φ = 14722560.

The previous prime is 56781617. The next prime is 56781707. The reversal of 56781648 is 84618765.

It is a happy number.

56781648 is a `hidden beast` number, since 567 + 81 + 6 + 4 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99508 + ... + 100076.

Almost surely, 2^56781648 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 56781648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102627360).

56781648 is an abundant number, since it is smaller than the sum of its proper divisors (148473072).

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

56781648 is a wasteful number, since it uses less digits than its factorization.

56781648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 592 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 56781648 is about 7535.3598454221. The cubic root of 56781648 is about 384.3580644531.

It can be divided in two parts, 567 and 81648, that multiplied together give a square (46294416 = 6804²).

The spelling of 56781648 in words is "fifty-six million, seven hundred eighty-one thousand, six hundred forty-eight".