501720120 has 384 divisors, whose sum is σ = 1894164480. Its totient is φ = 114048000.

The previous prime is 501720119. The next prime is 501720169. The reversal of 501720120 is 21027105.

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 = 501720093 and 501720102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7488327 + ... + 7488393.

It is an arithmetic number, because the mean of its divisors is an integer number (4932720).

Almost surely, 2^501720120 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 501720120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (947082240).

501720120 is an abundant number, since it is smaller than the sum of its proper divisors (1392444360).

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

501720120 is a wasteful number, since it uses less digits than its factorization.

501720120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 501720120 is about 22399.1098037400. The cubic root of 501720120 is about 794.6096576685.

Adding to 501720120 its reverse (21027105), we get a palindrome (522747225).

The spelling of 501720120 in words is "five hundred one million, seven hundred twenty thousand, one hundred twenty".