688406674 has 8 divisors (see below), whose sum is σ = 1040039280. Its totient is φ = 341726916.

The previous prime is 688406659. The next prime is 688406683. The reversal of 688406674 is 476604886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237864 + ... + 1238419.

It is an arithmetic number, because the mean of its divisors is an integer number (130004910).

Almost surely, 2^688406674 is an apocalyptic number.

688406674 is a deficient number, since it is larger than the sum of its proper divisors (351632606).

688406674 is a wasteful number, since it uses less digits than its factorization.

688406674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476424.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The square root of 688406674 is about 26237.5051024292. The cubic root of 688406674 is about 882.9748982525.

The spelling of 688406674 in words is "six hundred eighty-eight million, four hundred six thousand, six hundred seventy-four".