53781856 has 48 divisors (see below), whose sum is σ = 113626800. Its totient is φ = 24979968.

The previous prime is 53781853. The next prime is 53781883. The reversal of 53781856 is 65818735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31390 + ... + 33058.

It is an arithmetic number, because the mean of its divisors is an integer number (2367225).

Almost surely, 2^53781856 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 53781856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56813400).

53781856 is an abundant number, since it is smaller than the sum of its proper divisors (59844944).

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

53781856 is a wasteful number, since it uses less digits than its factorization.

53781856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1743 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 53781856 is about 7333.6113886679. The cubic root of 53781856 is about 377.4666572893.

The spelling of 53781856 in words is "fifty-three million, seven hundred eighty-one thousand, eight hundred fifty-six".