3121140240 has 60 divisors (see below), whose sum is σ = 10481831724. Its totient is φ = 832303872.

The previous prime is 3121140163. The next prime is 3121140257. The reversal of 3121140240 is 420411213.

3121140240 is a `hidden beast` number, since 312 + 114 + 0 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2415919104 + 705221136 = 49152^2 + 26556^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2166739 + ... + 2168178.

Almost surely, 2^3121140240 is an apocalyptic number.

3121140240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121140240 is an abundant number, since it is smaller than the sum of its proper divisors (7360691484).

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

3121140240 is a wasteful number, since it uses less digits than its factorization.

3121140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334936 (or 4334927 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3121140240 is about 55867.1660279990. The cubic root of 3121140240 is about 1461.4067007634.

Adding to 3121140240 its reverse (420411213), we get a palindrome (3541551453).

The spelling of 3121140240 in words is "three billion, one hundred twenty-one million, one hundred forty thousand, two hundred forty".