688441158 has 12 divisors (see below), whose sum is σ = 1491622548. Its totient is φ = 229480380.

The previous prime is 688441157. The next prime is 688441177. The reversal of 688441158 is 851144886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688441151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19123348 + ... + 19123383.

It is an arithmetic number, because the mean of its divisors is an integer number (124301879).

Almost surely, 2^688441158 is an apocalyptic number.

688441158 is an abundant number, since it is smaller than the sum of its proper divisors (803181390).

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

688441158 is a wasteful number, since it uses less digits than its factorization.

688441158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38246739 (or 38246736 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 688441158 is about 26238.1622450964. The cubic root of 688441158 is about 882.9896414749.

The spelling of 688441158 in words is "six hundred eighty-eight million, four hundred forty-one thousand, one hundred fifty-eight".