688468438 has 8 divisors (see below), whose sum is σ = 1180231632. Its totient is φ = 295057896.

The previous prime is 688468427. The next prime is 688468447. The reversal of 688468438 is 834864886.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24588145 + ... + 24588172.

It is an arithmetic number, because the mean of its divisors is an integer number (147528954).

Almost surely, 2^688468438 is an apocalyptic number.

688468438 is a deficient number, since it is larger than the sum of its proper divisors (491763194).

688468438 is a wasteful number, since it uses less digits than its factorization.

688468438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49176326.

The product of its digits is 7077888, while the sum is 55.

The square root of 688468438 is about 26238.6820934284. The cubic root of 688468438 is about 883.0013043643.

It can be divided in two parts, 68846 and 8438, that added together give a square (77284 = 278²).

The spelling of 688468438 in words is "six hundred eighty-eight million, four hundred sixty-eight thousand, four hundred thirty-eight".