1322728 has 16 divisors (see below), whose sum is σ = 2705760. Its totient is φ = 601200.

The previous prime is 1322693. The next prime is 1322731. The reversal of 1322728 is 8272231.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7428 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (169110).

2^1322728 is an apocalyptic number.

It is an amenable number.

1322728 is an abundant number, since it is smaller than the sum of its proper divisors (1383032).

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

1322728 is a wasteful number, since it uses less digits than its factorization.

1322728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15048 (or 15044 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 1322728 is about 1150.0991261626. The cubic root of 1322728 is about 109.7716474959.

Adding to 1322728 its reverse (8272231), we get a palindrome (9594959).

The spelling of 1322728 in words is "one million, three hundred twenty-two thousand, seven hundred twenty-eight".