688538950 has 48 divisors (see below), whose sum is σ = 1414034496. Its totient is φ = 247344800.

The previous prime is 688538941. The next prime is 688538951. The reversal of 688538950 is 59835886.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688538951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 38109 + ... + 53191.

It is an arithmetic number, because the mean of its divisors is an integer number (29459052).

Almost surely, 2^688538950 is an apocalyptic number.

688538950 is an abundant number, since it is smaller than the sum of its proper divisors (725495546).

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

688538950 is a wasteful number, since it uses less digits than its factorization.

688538950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15189 (or 15184 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The square root of 688538950 is about 26240.0257240728. The cubic root of 688538950 is about 883.0314485990.

The spelling of 688538950 in words is "six hundred eighty-eight million, five hundred thirty-eight thousand, nine hundred fifty".