4000501220 has 24 divisors (see below), whose sum is σ = 8406720000. Its totient is φ = 1599120992.

The previous prime is 4000501213. The next prime is 4000501231. The reversal of 4000501220 is 221050004.

It is a super-2 number, since 2×4000501220² = 32008020022442976800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4000501195 and 4000501204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36740 + ... + 96699.

It is an arithmetic number, because the mean of its divisors is an integer number (350280000).

Almost surely, 2^4000501220 is an apocalyptic number.

It is an amenable number.

4000501220 is an abundant number, since it is smaller than the sum of its proper divisors (4406218780).

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

4000501220 is a wasteful number, since it uses less digits than its factorization.

4000501220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134947 (or 134945 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 4000501220 is about 63249.5155712674. The cubic root of 4000501220 is about 1587.4673522953.

Adding to 4000501220 its reverse (221050004), we get a palindrome (4221551224).

The spelling of 4000501220 in words is "four billion, five hundred one thousand, two hundred twenty".