1322698644 has 72 divisors (see below), whose sum is σ = 3441802728. Its totient is φ = 427991040.

The previous prime is 1322698631. The next prime is 1322698703. The reversal of 1322698644 is 4468962231.

It can be written as a sum of positive squares in 4 ways, for example, as 1045875600 + 276823044 = 32340^2 + 16638^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1322698644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 767704 + ... + 769424.

Almost surely, 2^1322698644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322698644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720901364).

1322698644 is an abundant number, since it is smaller than the sum of its proper divisors (2119104084).

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

1322698644 is a wasteful number, since it uses less digits than its factorization.

1322698644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2340 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 1322698644 is about 36368.9241523584. The cubic root of 1322698644 is about 1097.7083541655.

The spelling of 1322698644 in words is "one billion, three hundred twenty-two million, six hundred ninety-eight thousand, six hundred forty-four".