1320641774 has 16 divisors (see below), whose sum is σ = 1989608400. Its totient is φ = 657445824.

The previous prime is 1320641747. The next prime is 1320641779. The reversal of 1320641774 is 4771460231.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320641779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573794 + ... + 576090.

It is an arithmetic number, because the mean of its divisors is an integer number (124350525).

Almost surely, 2^1320641774 is an apocalyptic number.

1320641774 is a deficient number, since it is larger than the sum of its proper divisors (668966626).

1320641774 is a wasteful number, since it uses less digits than its factorization.

1320641774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 1320641774 is about 36340.6352998954. The cubic root of 1320641774 is about 1097.1390597758.

The spelling of 1320641774 in words is "one billion, three hundred twenty million, six hundred forty-one thousand, seven hundred seventy-four".