1670881446 has 160 divisors (see below), whose sum is σ = 4250096928. Its totient is φ = 487088640.

The previous prime is 1670881441. The next prime is 1670881447. The reversal of 1670881446 is 6441880761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670881441) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3194541 + ... + 3195063.

Almost surely, 2^1670881446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1670881446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2125048464).

1670881446 is an abundant number, since it is smaller than the sum of its proper divisors (2579215482).

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

1670881446 is a wasteful number, since it uses less digits than its factorization.

1670881446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1670881446 is about 40876.4167460897. The cubic root of 1670881446 is about 1186.6296948917.

The spelling of 1670881446 in words is "one billion, six hundred seventy million, eight hundred eighty-one thousand, four hundred forty-six".