1200340728 has 32 divisors (see below), whose sum is σ = 3334280400. Its totient is φ = 400113504.

The previous prime is 1200340699. The next prime is 1200340787. The reversal of 1200340728 is 8270430021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2778351 + ... + 2778782.

Almost surely, 2^1200340728 is an apocalyptic number.

1200340728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1200340728 is an abundant number, since it is smaller than the sum of its proper divisors (2133939672).

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

1200340728 is a wasteful number, since it uses less digits than its factorization.

1200340728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557148 (or 5557138 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1200340728 is about 34645.9337873869. The cubic root of 1200340728 is about 1062.7591367562.

Adding to 1200340728 its reverse (8270430021), we get a palindrome (9470770749).

The spelling of 1200340728 in words is "one billion, two hundred million, three hundred forty thousand, seven hundred twenty-eight".