1322416728 has 24 divisors (see below), whose sum is σ = 3581545500. Its totient is φ = 440805552.

The previous prime is 1322416709. The next prime is 1322416751. The reversal of 1322416728 is 8276142231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1322416692 and 1322416701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9183378 + ... + 9183521.

Almost surely, 2^1322416728 is an apocalyptic number.

1322416728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1322416728 is an abundant number, since it is smaller than the sum of its proper divisors (2259128772).

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

1322416728 is a wasteful number, since it uses less digits than its factorization.

1322416728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18366911 (or 18366904 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1322416728 is about 36365.0481644119. The cubic root of 1322416728 is about 1097.6303612081.

Adding to 1322416728 its reverse (8276142231), we get a palindrome (9598558959).

The spelling of 1322416728 in words is "one billion, three hundred twenty-two million, four hundred sixteen thousand, seven hundred twenty-eight".