1956409808 has 20 divisors (see below), whose sum is σ = 3955351008. Its totient is φ = 935674080.

The previous prime is 1956409801. The next prime is 1956409811. The reversal of 1956409808 is 8089046591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956409801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2657798 + ... + 2658533.

Almost surely, 2^1956409808 is an apocalyptic number.

It is an amenable number.

1956409808 is an abundant number, since it is smaller than the sum of its proper divisors (1998941200).

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

1956409808 is a wasteful number, since it uses less digits than its factorization.

1956409808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316362 (or 5316356 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 1956409808 is about 44231.3215719359. The cubic root of 1956409808 is about 1250.7003665561.

The spelling of 1956409808 in words is "one billion, nine hundred fifty-six million, four hundred nine thousand, eight hundred eight".