1320643410 has 64 divisors (see below), whose sum is σ = 3214391040. Its totient is φ = 347212800.

The previous prime is 1320643403. The next prime is 1320643411. The reversal of 1320643410 is 143460231.

It is not an unprimeable number, because it can be changed into a prime (1320643411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1604259 + ... + 1605081.

It is an arithmetic number, because the mean of its divisors is an integer number (50224860).

Almost surely, 2^1320643410 is an apocalyptic number.

1320643410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320643410 is an abundant number, since it is smaller than the sum of its proper divisors (1893747630).

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

1320643410 is a wasteful number, since it uses less digits than its factorization.

1320643410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1320643410 is about 36340.6578091261. The cubic root of 1320643410 is about 1097.1395128178.

It can be divided in two parts, 13206 and 43410, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 1320643410 in words is "one billion, three hundred twenty million, six hundred forty-three thousand, four hundred ten".