671940500 has 192 divisors, whose sum is σ = 1892007936. Its totient is φ = 202320000.

The previous prime is 671940499. The next prime is 671940509. The reversal of 671940500 is 5049176.

It is a happy number.

671940500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671940509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1193219 + ... + 1193781.

It is an arithmetic number, because the mean of its divisors is an integer number (9854208).

Almost surely, 2^671940500 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 671940500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946003968).

671940500 is an abundant number, since it is smaller than the sum of its proper divisors (1220067436).

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

671940500 is a wasteful number, since it uses less digits than its factorization.

671940500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 671940500 is about 25921.8151370617. The cubic root of 671940500 is about 875.8779758863.

Adding to 671940500 its reverse (5049176), we get a palindrome (676989676).

The spelling of 671940500 in words is "six hundred seventy-one million, nine hundred forty thousand, five hundred".