671780272 has 20 divisors (see below), whose sum is σ = 1302142600. Its totient is φ = 335743488.

The previous prime is 671780269. The next prime is 671780281. The reversal of 671780272 is 272087176.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35104 + ... + 50752.

It is an arithmetic number, because the mean of its divisors is an integer number (65107130).

Almost surely, 2^671780272 is an apocalyptic number.

It is an amenable number.

671780272 is a deficient number, since it is larger than the sum of its proper divisors (630362328).

671780272 is a wasteful number, since it uses less digits than its factorization.

671780272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340 (or 18334 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 671780272 is about 25918.7243513256. The cubic root of 671780272 is about 875.8083510050.

The spelling of 671780272 in words is "six hundred seventy-one million, seven hundred eighty thousand, two hundred seventy-two".