331140040 has 96 divisors (see below), whose sum is σ = 945561600. Its totient is φ = 103205760.

The previous prime is 331140031. The next prime is 331140041. The reversal of 331140040 is 40041133.

It is a junction number, because it is equal to n+sod(n) for n = 331139996 and 331140023.

It is not an unprimeable number, because it can be changed into a prime (331140041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13881 + ... + 29239.

It is an arithmetic number, because the mean of its divisors is an integer number (9849600).

Almost surely, 2^331140040 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 331140040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472780800).

331140040 is an abundant number, since it is smaller than the sum of its proper divisors (614421560).

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

331140040 is a wasteful number, since it uses less digits than its factorization.

331140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15395 (or 15384 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 331140040 is about 18197.2536389423. The cubic root of 331140040 is about 691.8371820045.

Adding to 331140040 its reverse (40041133), we get a palindrome (371181173).

The spelling of 331140040 in words is "three hundred thirty-one million, one hundred forty thousand, forty".