4000031340 has 96 divisors (see below), whose sum is σ = 11532326400. Its totient is φ = 1035302400.

The previous prime is 4000031327. The next prime is 4000031341. The reversal of 4000031340 is 431300004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (4000031341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485455 + ... + 493625.

It is an arithmetic number, because the mean of its divisors is an integer number (120128400).

Almost surely, 2^4000031340 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 4000031340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5766163200).

4000031340 is an abundant number, since it is smaller than the sum of its proper divisors (7532295060).

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

4000031340 is a wasteful number, since it uses less digits than its factorization.

4000031340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 4000031340 is about 63245.8009673370. The cubic root of 4000031340 is about 1587.4051977198.

Adding to 4000031340 its reverse (431300004), we get a palindrome (4431331344).

The spelling of 4000031340 in words is "four billion, thirty-one thousand, three hundred forty".