50121840 has 80 divisors (see below), whose sum is σ = 157052448. Its totient is φ = 13221888.

The previous prime is 50121839. The next prime is 50121887. The reversal of 50121840 is 4812105.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22204 + ... + 24356.

Almost surely, 2^50121840 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 50121840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78526224).

50121840 is an abundant number, since it is smaller than the sum of its proper divisors (106930608).

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

50121840 is a wasteful number, since it uses less digits than its factorization.

50121840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 50121840 is about 7079.6779587775. The cubic root of 50121840 is about 368.7021487271.

Adding to 50121840 its reverse (4812105), we get a palindrome (54933945).

The spelling of 50121840 in words is "fifty million, one hundred twenty-one thousand, eight hundred forty".