501020080 has 80 divisors (see below), whose sum is σ = 1281060864. Its totient is φ = 180714240.

The previous prime is 501020059. The next prime is 501020081. The reversal of 501020080 is 80020105.

It is a happy number.

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

It is a super-2 number, since 2×501020080² = 502042241126412800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (501020081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109519 + ... + 114001.

Almost surely, 2^501020080 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 501020080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640530432).

501020080 is an abundant number, since it is smaller than the sum of its proper divisors (780040784).

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

501020080 is a wasteful number, since it uses less digits than its factorization.

501020080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634 (or 4628 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 501020080 is about 22383.4778352248. The cubic root of 501020080 is about 794.2399180232.

Adding to 501020080 its reverse (80020105), we get a palindrome (581040185).

The spelling of 501020080 in words is "five hundred one million, twenty thousand, eighty".