688274672 has 20 divisors (see below), whose sum is σ = 1341718440. Its totient is φ = 342024768.

The previous prime is 688274633. The next prime is 688274683. The reversal of 688274672 is 276472886.

It is a self number, because there is not a number n which added to its sum of digits gives 688274672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129347 + ... + 134562.

It is an arithmetic number, because the mean of its divisors is an integer number (67085922).

Almost surely, 2^688274672 is an apocalyptic number.

It is an amenable number.

688274672 is a deficient number, since it is larger than the sum of its proper divisors (653443768).

688274672 is a wasteful number, since it uses less digits than its factorization.

688274672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264080 (or 264074 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The square root of 688274672 is about 26234.9894606421. The cubic root of 688274672 is about 882.9184578240.

The spelling of 688274672 in words is "six hundred eighty-eight million, two hundred seventy-four thousand, six hundred seventy-two".