688771674 has 40 divisors (see below), whose sum is σ = 1546576020. Its totient is φ = 229112064.

The previous prime is 688771667. The next prime is 688771697. The reversal of 688771674 is 476177886.

It can be written as a sum of positive squares in 2 ways, for example, as 646430625 + 42341049 = 25425^2 + 6507^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 688771674.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78282 + ... + 86634.

Almost surely, 2^688771674 is an apocalyptic number.

688771674 is an abundant number, since it is smaller than the sum of its proper divisors (857804346).

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

688771674 is a wasteful number, since it uses less digits than its factorization.

688771674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876 (or 8867 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 688771674 is about 26244.4598725140. The cubic root of 688771674 is about 883.1309246766.

The spelling of 688771674 in words is "six hundred eighty-eight million, seven hundred seventy-one thousand, six hundred seventy-four".