3111402440 has 16 divisors (see below), whose sum is σ = 7000655580. Its totient is φ = 1244560960.

The previous prime is 3111402419. The next prime is 3111402449. The reversal of 3111402440 is 442041113.

It can be written as a sum of positive squares in 2 ways, for example, as 3111185284 + 217156 = 55778^2 + 466^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (3111402449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38892491 + ... + 38892570.

Almost surely, 2^3111402440 is an apocalyptic number.

It is an amenable number.

3111402440 is an abundant number, since it is smaller than the sum of its proper divisors (3889253140).

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

3111402440 is a wasteful number, since it uses less digits than its factorization.

3111402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77785072 (or 77785068 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 3111402440 is about 55779.9465758080. The cubic root of 3111402440 is about 1459.8852790325.

Adding to 3111402440 its reverse (442041113), we get a palindrome (3553443553).

The spelling of 3111402440 in words is "three billion, one hundred eleven million, four hundred two thousand, four hundred forty".