1326394628 has 24 divisors (see below), whose sum is σ = 2500779288. Its totient is φ = 611928576.

The previous prime is 1326394627. The next prime is 1326394651. The reversal of 1326394628 is 8264936231.

It can be written as a sum of positive squares in 4 ways, for example, as 123904 + 1326270724 = 352^2 + 36418^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1326394627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190700 + ... + 197532.

It is an arithmetic number, because the mean of its divisors is an integer number (104199137).

Almost surely, 2^1326394628 is an apocalyptic number.

It is an amenable number.

1326394628 is a deficient number, since it is larger than the sum of its proper divisors (1174384660).

1326394628 is a wasteful number, since it uses less digits than its factorization.

1326394628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583 (or 10581 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 1326394628 is about 36419.7010970711. The cubic root of 1326394628 is about 1098.7298363933.

The spelling of 1326394628 in words is "one billion, three hundred twenty-six million, three hundred ninety-four thousand, six hundred twenty-eight".