2012631440 has 20 divisors (see below), whose sum is σ = 4679368284. Its totient is φ = 805052544.

The previous prime is 2012631437. The next prime is 2012631451. The reversal of 2012631440 is 441362102.

2012631440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1085307136 + 927324304 = 32944^2 + 30452^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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, 12578867 + ... + 12579026.

Almost surely, 2^2012631440 is an apocalyptic number.

2012631440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012631440 is an abundant number, since it is smaller than the sum of its proper divisors (2666736844).

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

2012631440 is a wasteful number, since it uses less digits than its factorization.

2012631440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25157906 (or 25157900 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2012631440 is about 44862.3610613619. The cubic root of 2012631440 is about 1262.5679215819.

Adding to 2012631440 its reverse (441362102), we get a palindrome (2453993542).

The spelling of 2012631440 in words is "two billion, twelve million, six hundred thirty-one thousand, four hundred forty".