671788788 has 48 divisors (see below), whose sum is σ = 1713265344. Its totient is φ = 203184640.

The previous prime is 671788781. The next prime is 671788823. The reversal of 671788788 is 887887176.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671788781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68956 + ... + 78092.

It is an arithmetic number, because the mean of its divisors is an integer number (35693028).

Almost surely, 2^671788788 is an apocalyptic number.

It is an amenable number.

671788788 is an abundant number, since it is smaller than the sum of its proper divisors (1041476556).

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

671788788 is a wasteful number, since it uses less digits than its factorization.

671788788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712 (or 9710 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 60.

The square root of 671788788 is about 25918.8886335815. Note that the first 3 decimals coincide. The cubic root of 671788788 is about 875.8120517946.

The spelling of 671788788 in words is "six hundred seventy-one million, seven hundred eighty-eight thousand, seven hundred eighty-eight".