50931840 has 128 divisors (see below), whose sum is σ = 166561920. Its totient is φ = 13230080.

The previous prime is 50931833. The next prime is 50931841. The reversal of 50931840 is 4813905.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 50931798 and 50931807.

It is not an unprimeable number, because it can be changed into a prime (50931841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78397 + ... + 79043.

It is an arithmetic number, because the mean of its divisors is an integer number (1301265).

Almost surely, 2^50931840 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 50931840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83280960).

50931840 is an abundant number, since it is smaller than the sum of its proper divisors (115630080).

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

50931840 is a wasteful number, since it uses less digits than its factorization.

50931840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 50931840 is about 7136.6546784891. The cubic root of 50931840 is about 370.6776963634.

The spelling of 50931840 in words is "fifty million, nine hundred thirty-one thousand, eight hundred forty".