671812224 has 128 divisors (see below), whose sum is σ = 1856856960. Its totient is φ = 215040000.

The previous prime is 671812213. The next prime is 671812249. The reversal of 671812224 is 422218176.

It is a tau number, because it is divible by the number of its divisors (128).

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, 1117524 + ... + 1118124.

It is an arithmetic number, because the mean of its divisors is an integer number (14506695).

Almost surely, 2^671812224 is an apocalyptic number.

671812224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671812224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928428480).

671812224 is an abundant number, since it is smaller than the sum of its proper divisors (1185044736).

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

671812224 is a wasteful number, since it uses less digits than its factorization.

671812224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 718 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 671812224 is about 25919.3407323566. The cubic root of 671812224 is about 875.8222361923.

The spelling of 671812224 in words is "six hundred seventy-one million, eight hundred twelve thousand, two hundred twenty-four".