2642790440 has 16 divisors (see below), whose sum is σ = 5946278580. Its totient is φ = 1057116160.

The previous prime is 2642790439. The next prime is 2642790443. The reversal of 2642790440 is 440972462.

It can be written as a sum of positive squares in 2 ways, for example, as 2511412996 + 131377444 = 50114^2 + 11462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2642790394 and 2642790403.

It is not an unprimeable number, because it can be changed into a prime (2642790443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33034841 + ... + 33034920.

Almost surely, 2^2642790440 is an apocalyptic number.

2642790440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2642790440 is an abundant number, since it is smaller than the sum of its proper divisors (3303488140).

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

2642790440 is a wasteful number, since it uses less digits than its factorization.

2642790440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66069772 (or 66069768 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 2642790440 is about 51408.0775754161. The cubic root of 2642790440 is about 1382.5714220476.

The spelling of 2642790440 in words is "two billion, six hundred forty-two million, seven hundred ninety thousand, four hundred forty".