678236672 has 20 divisors (see below), whose sum is σ = 1355149686. Its totient is φ = 339118080.

The previous prime is 678236653. The next prime is 678236681. The reversal of 678236672 is 276632876.

It can be written as a sum of positive squares in only one way, i.e., 552438016 + 125798656 = 23504^2 + 11216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661829 + ... + 662852.

Almost surely, 2^678236672 is an apocalyptic number.

It is an amenable number.

678236672 is a deficient number, since it is larger than the sum of its proper divisors (676913014).

678236672 is an equidigital number, since it uses as much as digits as its factorization.

678236672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324699 (or 1324683 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 678236672 is about 26042.9774027472. The cubic root of 678236672 is about 878.6051732454.

The spelling of 678236672 in words is "six hundred seventy-eight million, two hundred thirty-six thousand, six hundred seventy-two".