688426392 has 64 divisors (see below), whose sum is σ = 1832112000. Its totient is φ = 214942464.

The previous prime is 688426351. The next prime is 688426429. The reversal of 688426392 is 293624886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32103 + ... + 49065.

It is an arithmetic number, because the mean of its divisors is an integer number (28626750).

Almost surely, 2^688426392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688426392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916056000).

688426392 is an abundant number, since it is smaller than the sum of its proper divisors (1143685608).

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

688426392 is a wasteful number, since it uses less digits than its factorization.

688426392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17080 (or 17076 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 688426392 is about 26237.8808595511. The cubic root of 688426392 is about 882.9833285082.

The spelling of 688426392 in words is "six hundred eighty-eight million, four hundred twenty-six thousand, three hundred ninety-two".