50891040 has 144 divisors (see below), whose sum is σ = 176904000. Its totient is φ = 13318656.

The previous prime is 50891039. The next prime is 50891069. The reversal of 50891040 is 4019805.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 50890995 and 50891013.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 84661 + ... + 85259.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^50891040 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 50891040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88452000).

50891040 is an abundant number, since it is smaller than the sum of its proper divisors (126012960).

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

50891040 is a wasteful number, since it uses less digits than its factorization.

50891040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 50891040 is about 7133.7956236494. The cubic root of 50891040 is about 370.5786902526.

The spelling of 50891040 in words is "fifty million, eight hundred ninety-one thousand, forty".