671782956 has 24 divisors (see below), whose sum is σ = 1688070384. Its totient is φ = 206702400.

The previous prime is 671782949. The next prime is 671782961. The reversal of 671782956 is 659287176.

It is a junction number, because it is equal to n+sod(n) for n = 671782899 and 671782908.

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, 2152995 + ... + 2153306.

It is an arithmetic number, because the mean of its divisors is an integer number (70336266).

Almost surely, 2^671782956 is an apocalyptic number.

It is an amenable number.

671782956 is an abundant number, since it is smaller than the sum of its proper divisors (1016287428).

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

671782956 is a wasteful number, since it uses less digits than its factorization.

671782956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306321 (or 4306319 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 671782956 is about 25918.7761285135. The cubic root of 671782956 is about 875.8095173915.

The spelling of 671782956 in words is "six hundred seventy-one million, seven hundred eighty-two thousand, nine hundred fifty-six".