1664028208 has 40 divisors (see below), whose sum is σ = 3396679920. Its totient is φ = 787541760.

The previous prime is 1664028103. The next prime is 1664028209. The reversal of 1664028208 is 8028204661.

It is not an unprimeable number, because it can be changed into a prime (1664028209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605718 + ... + 608458.

It is an arithmetic number, because the mean of its divisors is an integer number (84916998).

Almost surely, 2^1664028208 is an apocalyptic number.

It is an amenable number.

1664028208 is an abundant number, since it is smaller than the sum of its proper divisors (1732651712).

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

1664028208 is a wasteful number, since it uses less digits than its factorization.

1664028208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4759 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 1664028208 is about 40792.5018600232. The cubic root of 1664028208 is about 1185.0051233258.

The spelling of 1664028208 in words is "one billion, six hundred sixty-four million, twenty-eight thousand, two hundred eight".