50981940 has 96 divisors (see below), whose sum is σ = 166992000. Its totient is φ = 12877056.

The previous prime is 50981899. The next prime is 50981941. The reversal of 50981940 is 4918905.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 50981895 and 50981904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50981941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7776 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (1739500).

Almost surely, 2^50981940 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 50981940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83496000).

50981940 is an abundant number, since it is smaller than the sum of its proper divisors (116010060).

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

50981940 is a wasteful number, since it uses less digits than its factorization.

50981940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006 (or 4998 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 50981940 is about 7140.1638636659. The cubic root of 50981940 is about 370.7991977444.

The spelling of 50981940 in words is "fifty million, nine hundred eighty-one thousand, nine hundred forty".