1664287434 has 48 divisors (see below), whose sum is σ = 3666004992. Its totient is φ = 545569344.

The previous prime is 1664287333. The next prime is 1664287439. The reversal of 1664287434 is 4347824661.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1664287434.

It is not an unprimeable number, because it can be changed into a prime (1664287439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501609 + ... + 504915.

It is an arithmetic number, because the mean of its divisors is an integer number (76375104).

Almost surely, 2^1664287434 is an apocalyptic number.

1664287434 is an abundant number, since it is smaller than the sum of its proper divisors (2001717558).

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

1664287434 is a wasteful number, since it uses less digits than its factorization.

1664287434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771 (or 3768 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 1664287434 is about 40795.6791094351. The cubic root of 1664287434 is about 1185.0666543718.

The spelling of 1664287434 in words is "one billion, six hundred sixty-four million, two hundred eighty-seven thousand, four hundred thirty-four".