50120820 has 72 divisors (see below), whose sum is σ = 152696544. Its totient is φ = 13307328.

The previous prime is 50120813. The next prime is 50120821. The reversal of 50120820 is 2802105.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 50120793 and 50120802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50120821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54807 + ... + 55713.

Almost surely, 2^50120820 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 50120820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76348272).

50120820 is an abundant number, since it is smaller than the sum of its proper divisors (102575724).

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

50120820 is a wasteful number, since it uses less digits than its factorization.

50120820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 50120820 is about 7079.6059212360. The cubic root of 50120820 is about 368.6996476302.

Adding to 50120820 its reverse (2802105), we get a palindrome (52922925).

It can be divided in two parts, 501 and 20820, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 50120820 in words is "fifty million, one hundred twenty thousand, eight hundred twenty".