1606639488 has 32 divisors (see below), whose sum is σ = 4267637160. Its totient is φ = 535546368.

The previous prime is 1606639483. The next prime is 1606639513. The reversal of 1606639488 is 8849366061.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1606639488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606639483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091595 + ... + 2092362.

Almost surely, 2^1606639488 is an apocalyptic number.

It is an amenable number.

1606639488 is an abundant number, since it is smaller than the sum of its proper divisors (2660997672).

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

1606639488 is an equidigital number, since it uses as much as digits as its factorization.

1606639488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183974 (or 4183962 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1606639488 is about 40082.9076789596. The cubic root of 1606639488 is about 1171.2226943257. Note that the first 3 decimals are identical.

The spelling of 1606639488 in words is "one billion, six hundred six million, six hundred thirty-nine thousand, four hundred eighty-eight".