671234816 has 144 divisors (see below), whose sum is σ = 1623164928. Its totient is φ = 270950400.

The previous prime is 671234779. The next prime is 671234827. The reversal of 671234816 is 618432176.

Its product of digits (48384) is a multiple of the sum of its prime factors (378).

It is a self number, because there is not a number n which added to its sum of digits gives 671234816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2388596 + ... + 2388876.

Almost surely, 2^671234816 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 671234816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811582464).

671234816 is an abundant number, since it is smaller than the sum of its proper divisors (951930112).

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

671234816 is a wasteful number, since it uses less digits than its factorization.

671234816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 364 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 671234816 is about 25908.1997830803. The cubic root of 671234816 is about 875.5712475488.

The spelling of 671234816 in words is "six hundred seventy-one million, two hundred thirty-four thousand, eight hundred sixteen".