1664492032 has 120 divisors (see below), whose sum is σ = 4040080704. Its totient is φ = 670973952.

The previous prime is 1664491999. The next prime is 1664492059. The reversal of 1664492032 is 2302944661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1664491982 and 1664492000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1034973 + ... + 1036579.

Almost surely, 2^1664492032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664492032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020040352).

1664492032 is an abundant number, since it is smaller than the sum of its proper divisors (2375588672).

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

1664492032 is an equidigital number, since it uses as much as digits as its factorization.

1664492032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1664492032 is about 40798.1866263686. The cubic root of 1664492032 is about 1185.1152141593.

The spelling of 1664492032 in words is "one billion, six hundred sixty-four million, four hundred ninety-two thousand, thirty-two".