688340524 has 12 divisors (see below), whose sum is σ = 1211987224. Its totient is φ = 342058464.

The previous prime is 688340519. The next prime is 688340539. The reversal of 688340524 is 425043886.

It is a super-3 number, since 3×688340524³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 527217 + ... + 528520.

Almost surely, 2^688340524 is an apocalyptic number.

It is an amenable number.

688340524 is a deficient number, since it is larger than the sum of its proper divisors (523646700).

688340524 is a wasteful number, since it uses less digits than its factorization.

688340524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055904 (or 1055902 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 688340524 is about 26236.2444721039. The cubic root of 688340524 is about 882.9466152319.

The spelling of 688340524 in words is "six hundred eighty-eight million, three hundred forty thousand, five hundred twenty-four".