53781880 has 64 divisors (see below), whose sum is σ = 129276000. Its totient is φ = 20066304.

The previous prime is 53781853. The next prime is 53781883. The reversal of 53781880 is 8818735.

53781880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94236 + ... + 94804.

Almost surely, 2^53781880 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 53781880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64638000).

53781880 is an abundant number, since it is smaller than the sum of its proper divisors (75494120).

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

53781880 is a wasteful number, since it uses less digits than its factorization.

53781880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 53781880 is about 7333.6130249693. The cubic root of 53781880 is about 377.4667134371.

The spelling of 53781880 in words is "fifty-three million, seven hundred eighty-one thousand, eight hundred eighty".