671860464 has 80 divisors (see below), whose sum is σ = 1919472384. Its totient is φ = 200793600.

The previous prime is 671860459. The next prime is 671860499. The reversal of 671860464 is 464068176.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29829 + ... + 47259.

Almost surely, 2^671860464 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 671860464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959736192).

671860464 is an abundant number, since it is smaller than the sum of its proper divisors (1247611920).

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

671860464 is a wasteful number, since it uses less digits than its factorization.

671860464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17526 (or 17520 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 671860464 is about 25920.2712948765. The cubic root of 671860464 is about 875.8431987232.

The spelling of 671860464 in words is "six hundred seventy-one million, eight hundred sixty thousand, four hundred sixty-four".