3440026640 has 20 divisors (see below), whose sum is σ = 7998062124. Its totient is φ = 1376010624.

The previous prime is 3440026637. The next prime is 3440026643. The reversal of 3440026640 is 466200443.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3440026637) and next prime (3440026643).

It can be written as a sum of positive squares in 2 ways, for example, as 2718996736 + 721029904 = 52144^2 + 26852^2 .

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

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

3440026640 is a modest number, since divided by 26640 gives 3440 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3440026643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21500087 + ... + 21500246.

Almost surely, 2^3440026640 is an apocalyptic number.

It is an amenable number.

3440026640 is an abundant number, since it is smaller than the sum of its proper divisors (4558035484).

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

3440026640 is a wasteful number, since it uses less digits than its factorization.

3440026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43000346 (or 43000340 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 3440026640 is about 58651.7402981361. The cubic root of 3440026640 is about 1509.5723596405.

The spelling of 3440026640 in words is "three billion, four hundred forty million, twenty-six thousand, six hundred forty".