1664830128 has 80 divisors (see below), whose sum is σ = 4904123616. Its totient is φ = 482119680.

The previous prime is 1664830127. The next prime is 1664830147. The reversal of 1664830128 is 8210384661.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1664830127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67863 + ... + 89078.

Almost surely, 2^1664830128 is an apocalyptic number.

It is an amenable number.

1664830128 is an abundant number, since it is smaller than the sum of its proper divisors (3239293488).

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

1664830128 is a wasteful number, since it uses less digits than its factorization.

1664830128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156982 (or 156976 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1664830128 is about 40802.3299334732. The cubic root of 1664830128 is about 1185.1954499668.

The spelling of 1664830128 in words is "one billion, six hundred sixty-four million, eight hundred thirty thousand, one hundred twenty-eight".