52731840 has 336 divisors, whose sum is σ = 208483200. Its totient is φ = 11225088.

The previous prime is 52731829. The next prime is 52731869. The reversal of 52731840 is 4813725.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 52731798 and 52731807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 893731 + ... + 893789.

Almost surely, 2^52731840 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 52731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104241600).

52731840 is an abundant number, since it is smaller than the sum of its proper divisors (155751360).

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

52731840 is a wasteful number, since it uses less digits than its factorization.

52731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 52731840 is about 7261.6692295918. The cubic root of 52731840 is about 374.9939910148.

The spelling of 52731840 in words is "fifty-two million, seven hundred thirty-one thousand, eight hundred forty".