1628660064 has 48 divisors (see below), whose sum is σ = 4277726208. Its totient is φ = 542570112.

The previous prime is 1628660057. The next prime is 1628660083. The reversal of 1628660064 is 4600668261.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208029 + ... + 215715.

It is an arithmetic number, because the mean of its divisors is an integer number (89119296).

Almost surely, 2^1628660064 is an apocalyptic number.

It is an amenable number.

1628660064 is an abundant number, since it is smaller than the sum of its proper divisors (2649066144).

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

1628660064 is a wasteful number, since it uses less digits than its factorization.

1628660064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9907 (or 9899 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1628660064 is about 40356.6607141869. The cubic root of 1628660064 is about 1176.5493522969.

The spelling of 1628660064 in words is "one billion, six hundred twenty-eight million, six hundred sixty thousand, sixty-four".