4000020312 has 32 divisors (see below), whose sum is σ = 10005958080. Its totient is φ = 1332552480.

The previous prime is 4000020289. The next prime is 4000020317. The reversal of 4000020312 is 2130200004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000020317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7014 + ... + 89717.

It is an arithmetic number, because the mean of its divisors is an integer number (312686190).

Almost surely, 2^4000020312 is an apocalyptic number.

It is an amenable number.

4000020312 is an abundant number, since it is smaller than the sum of its proper divisors (6005937768).

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

4000020312 is a wasteful number, since it uses less digits than its factorization.

4000020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98463 (or 98459 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 4000020312 is about 63245.7137836233. The cubic root of 4000020312 is about 1587.4037389045.

Adding to 4000020312 its reverse (2130200004), we get a palindrome (6130220316).

The spelling of 4000020312 in words is "four billion, twenty thousand, three hundred twelve".