50921920 has 112 divisors (see below), whose sum is σ = 140451840. Its totient is φ = 17224704.

The previous prime is 50921891. The next prime is 50921921. The reversal of 50921920 is 2912905.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50921921) 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, 284391 + ... + 284569.

Almost surely, 2^50921920 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 50921920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70225920).

50921920 is an abundant number, since it is smaller than the sum of its proper divisors (89529920).

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

50921920 is a wasteful number, since it uses less digits than its factorization.

50921920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 50921920 is about 7135.9596411415. The cubic root of 50921920 is about 370.6536291557.

The spelling of 50921920 in words is "fifty million, nine hundred twenty-one thousand, nine hundred twenty".