688234944 has 56 divisors (see below), whose sum is σ = 1829092608. Its totient is φ = 228386560.

The previous prime is 688234903. The next prime is 688234961. The reversal of 688234944 is 449432886.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 688234893 and 688234902.

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, 35689 + ... + 51479.

It is an arithmetic number, because the mean of its divisors is an integer number (32662368).

Almost surely, 2^688234944 is an apocalyptic number.

688234944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688234944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914546304).

688234944 is an abundant number, since it is smaller than the sum of its proper divisors (1140857664).

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

688234944 is a wasteful number, since it uses less digits than its factorization.

688234944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16033 (or 16023 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 48.

The square root of 688234944 is about 26234.2322929412. The cubic root of 688234944 is about 882.9014698099.

The spelling of 688234944 in words is "six hundred eighty-eight million, two hundred thirty-four thousand, nine hundred forty-four".