1428728732 has 12 divisors (see below), whose sum is σ = 2586491880. Its totient is φ = 689731056.

The previous prime is 1428728723. The next prime is 1428728797. The reversal of 1428728732 is 2378278241.

It is a congruent number.

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, 6158198 + ... + 6158429.

It is an arithmetic number, because the mean of its divisors is an integer number (215540990).

Almost surely, 2^1428728732 is an apocalyptic number.

It is an amenable number.

1428728732 is a deficient number, since it is larger than the sum of its proper divisors (1157763148).

1428728732 is a wasteful number, since it uses less digits than its factorization.

1428728732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12316660 (or 12316658 counting only the distinct ones).

The product of its digits is 301056, while the sum is 44.

The square root of 1428728732 is about 37798.5281724038. The cubic root of 1428728732 is about 1126.2892168788.

The spelling of 1428728732 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-eight thousand, seven hundred thirty-two".