688117436 has 24 divisors (see below), whose sum is σ = 1217240640. Its totient is φ = 340345152.

The previous prime is 688117429. The next prime is 688117499. The reversal of 688117436 is 634711886.

688117436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433901 + ... + 435483.

It is an arithmetic number, because the mean of its divisors is an integer number (50718360).

Almost surely, 2^688117436 is an apocalyptic number.

It is an amenable number.

688117436 is a deficient number, since it is larger than the sum of its proper divisors (529123204).

688117436 is a wasteful number, since it uses less digits than its factorization.

688117436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693 (or 2691 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 688117436 is about 26231.9926044515. The cubic root of 688117436 is about 882.8512186121.

The spelling of 688117436 in words is "six hundred eighty-eight million, one hundred seventeen thousand, four hundred thirty-six".