52681840 has 40 divisors (see below), whose sum is σ = 122791248. Its totient is φ = 21020160.

The previous prime is 52681823. The next prime is 52681873. The reversal of 52681840 is 4818625.

52681840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 52681796 and 52681805.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54804 + ... + 55756.

Almost surely, 2^52681840 is an apocalyptic number.

It is an amenable number.

52681840 is an abundant number, since it is smaller than the sum of its proper divisors (70109408).

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

52681840 is a wasteful number, since it uses less digits than its factorization.

52681840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 52681840 is about 7258.2256784975. The cubic root of 52681840 is about 374.8754312175.

The spelling of 52681840 in words is "fifty-two million, six hundred eighty-one thousand, eight hundred forty".