671224464 has 135 divisors (see below), whose sum is σ = 2011332297. Its totient is φ = 208922112.

The previous prime is 671224429. The next prime is 671224483. The reversal of 671224464 is 464422176.

The square root of 671224464 is 25908.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 522579600 + 148644864 = 22860^2 + 12192^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5285169 + ... + 5285295.

Almost surely, 2^671224464 is an apocalyptic number.

671224464 is the 25908-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671224464

671224464 is an abundant number, since it is smaller than the sum of its proper divisors (1340107833).

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

671224464 is a wasteful number, since it uses less digits than its factorization.

671224464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 149 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The cubic root of 671224464 is about 875.5667464116.

Multiplying 671224464 by its sum of digits (36), we get a square (24164080704 = 155448²).

671224464 divided by its sum of digits (36) gives a square (18645124 = 4318²).

The spelling of 671224464 in words is "six hundred seventy-one million, two hundred twenty-four thousand, four hundred sixty-four".