671604336 has 240 divisors, whose sum is σ = 2131863552. Its totient is φ = 195955200.

The previous prime is 671604299. The next prime is 671604337. The reversal of 671604336 is 633406176.

It is a happy number.

671604336 is a `hidden beast` number, since 67 + 160 + 433 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 671604336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671604337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4120191 + ... + 4120353.

Almost surely, 2^671604336 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 671604336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1065931776).

671604336 is an abundant number, since it is smaller than the sum of its proper divisors (1460259216).

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

671604336 is a wasteful number, since it uses less digits than its factorization.

671604336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 671604336 is about 25915.3301348835. The cubic root of 671604336 is about 875.7318876742.

The spelling of 671604336 in words is "six hundred seventy-one million, six hundred four thousand, three hundred thirty-six".