671890772 has 24 divisors (see below), whose sum is σ = 1347311616. Its totient is φ = 287196768.

The previous prime is 671890753. The next prime is 671890811. The reversal of 671890772 is 277098176.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20603 + ... + 42050.

It is an arithmetic number, because the mean of its divisors is an integer number (56137984).

Almost surely, 2^671890772 is an apocalyptic number.

It is an amenable number.

671890772 is an abundant number, since it is smaller than the sum of its proper divisors (675420844).

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

671890772 is a wasteful number, since it uses less digits than its factorization.

671890772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63047 (or 63045 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 671890772 is about 25920.8559272259. The cubic root of 671890772 is about 875.8563684501.

The spelling of 671890772 in words is "six hundred seventy-one million, eight hundred ninety thousand, seven hundred seventy-two".