688145358 has 16 divisors (see below), whose sum is σ = 1386798336. Its totient is φ = 227630520.

The previous prime is 688145357. The next prime is 688145371. The reversal of 688145358 is 853541886.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688145357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436966 + ... + 438537.

It is an arithmetic number, because the mean of its divisors is an integer number (86674896).

Almost surely, 2^688145358 is an apocalyptic number.

688145358 is an abundant number, since it is smaller than the sum of its proper divisors (698652978).

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

688145358 is a wasteful number, since it uses less digits than its factorization.

688145358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875639.

The product of its digits is 921600, while the sum is 48.

The square root of 688145358 is about 26232.5248117675. The cubic root of 688145358 is about 882.8631597125.

The spelling of 688145358 in words is "six hundred eighty-eight million, one hundred forty-five thousand, three hundred fifty-eight".