671787132 has 48 divisors (see below), whose sum is σ = 1609064352. Its totient is φ = 218014720.

The previous prime is 671787101. The next prime is 671787163. The reversal of 671787132 is 231787176.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (671787101) and next prime (671787163).

It is a congruent number.

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, 302458 + ... + 304670.

It is an arithmetic number, because the mean of its divisors is an integer number (33522174).

Almost surely, 2^671787132 is an apocalyptic number.

It is an amenable number.

671787132 is an abundant number, since it is smaller than the sum of its proper divisors (937277220).

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

671787132 is a wasteful number, since it uses less digits than its factorization.

671787132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2876 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 671787132 is about 25918.8566877476. The cubic root of 671787132 is about 875.8113321508.

The spelling of 671787132 in words is "six hundred seventy-one million, seven hundred eighty-seven thousand, one hundred thirty-two".