1326265644 has 24 divisors (see below), whose sum is σ = 3375949248. Its totient is φ = 401898640.

The previous prime is 1326265639. The next prime is 1326265649. The reversal of 1326265644 is 4465626231.

It is an interprime number because it is at equal distance from previous prime (1326265639) and next prime (1326265649).

It is not an unprimeable number, because it can be changed into a prime (1326265649) 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, 5023602 + ... + 5023865.

It is an arithmetic number, because the mean of its divisors is an integer number (140664552).

Almost surely, 2^1326265644 is an apocalyptic number.

It is an amenable number.

1326265644 is an abundant number, since it is smaller than the sum of its proper divisors (2049683604).

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

1326265644 is a wasteful number, since it uses less digits than its factorization.

1326265644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047485 (or 10047483 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 1326265644 is about 36417.9302542031. The cubic root of 1326265644 is about 1098.6942202551.

The spelling of 1326265644 in words is "one billion, three hundred twenty-six million, two hundred sixty-five thousand, six hundred forty-four".