1629343728 has 80 divisors (see below), whose sum is σ = 4681724160. Its totient is φ = 542545344.

The previous prime is 1629343717. The next prime is 1629343747. The reversal of 1629343728 is 8273439261.

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 15 ways as a sum of consecutive naturals, for example, 693051 + ... + 695397.

It is an arithmetic number, because the mean of its divisors is an integer number (58521552).

Almost surely, 2^1629343728 is an apocalyptic number.

1629343728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1629343728 is an abundant number, since it is smaller than the sum of its proper divisors (3052380432).

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

1629343728 is a wasteful number, since it uses less digits than its factorization.

1629343728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3959 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1629343728 is about 40365.1301001248. The cubic root of 1629343728 is about 1176.7139563029.

The spelling of 1629343728 in words is "one billion, six hundred twenty-nine million, three hundred forty-three thousand, seven hundred twenty-eight".