688340450 has 48 divisors (see below), whose sum is σ = 1476720960. Its totient is φ = 233824320.

The previous prime is 688340437. The next prime is 688340501. The reversal of 688340450 is 54043886.

It is a happy number.

688340450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29129 + ... + 47171.

It is an arithmetic number, because the mean of its divisors is an integer number (30765020).

Almost surely, 2^688340450 is an apocalyptic number.

688340450 is an abundant number, since it is smaller than the sum of its proper divisors (788380510).

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

688340450 is a wasteful number, since it uses less digits than its factorization.

688340450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18171 (or 18166 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 688340450 is about 26236.2430618410. The cubic root of 688340450 is about 882.9465835915.

The spelling of 688340450 in words is "six hundred eighty-eight million, three hundred forty thousand, four hundred fifty".