671443344 has 200 divisors, whose sum is σ = 2283728832. Its totient is φ = 187764480.

The previous prime is 671443327. The next prime is 671443349. The reversal of 671443344 is 443344176.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 671443299 and 671443308.

It is not an unprimeable number, because it can be changed into a prime (671443349) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 183517 + ... + 187139.

Almost surely, 2^671443344 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 671443344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141864416).

671443344 is an abundant number, since it is smaller than the sum of its proper divisors (1612285488).

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

671443344 is a wasteful number, since it uses less digits than its factorization.

671443344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667 (or 3652 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 671443344 is about 25912.2238335501. The cubic root of 671443344 is about 875.6619074356.

The spelling of 671443344 in words is "six hundred seventy-one million, four hundred forty-three thousand, three hundred forty-four".