688340574 has 48 divisors (see below), whose sum is σ = 1608967152. Its totient is φ = 211870464.

The previous prime is 688340561. The next prime is 688340599. The reversal of 688340574 is 475043886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5004 + ... + 37439.

It is an arithmetic number, because the mean of its divisors is an integer number (33520149).

Almost surely, 2^688340574 is an apocalyptic number.

688340574 is an abundant number, since it is smaller than the sum of its proper divisors (920626578).

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

688340574 is a wasteful number, since it uses less digits than its factorization.

688340574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42521 (or 42518 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 688340574 is about 26236.2454249841. The cubic root of 688340574 is about 882.9466366105.

The spelling of 688340574 in words is "six hundred eighty-eight million, three hundred forty thousand, five hundred seventy-four".