688452252 has 24 divisors (see below), whose sum is σ = 1606812816. Its totient is φ = 229423488.

The previous prime is 688452217. The next prime is 688452253. The reversal of 688452252 is 252254886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688452253) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 85888 + ... + 93560.

It is an arithmetic number, because the mean of its divisors is an integer number (66950534).

Almost surely, 2^688452252 is an apocalyptic number.

It is an amenable number.

688452252 is an abundant number, since it is smaller than the sum of its proper divisors (918360564).

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

688452252 is a wasteful number, since it uses less digits than its factorization.

688452252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15157 (or 15155 counting only the distinct ones).

The product of its digits is 307200, while the sum is 42.

The square root of 688452252 is about 26238.3736538681. The cubic root of 688452252 is about 882.9943844774.

The spelling of 688452252 in words is "six hundred eighty-eight million, four hundred fifty-two thousand, two hundred fifty-two".