688887345 has 32 divisors (see below), whose sum is σ = 1174953600. Its totient is φ = 343454720.

The previous prime is 688887341. The next prime is 688887377. The reversal of 688887345 is 543788886.

It is a happy number.

It is not a de Polignac number, because 688887345 - 2² = 688887341 is a prime.

It is a super-2 number, since 2×688887345² = 949131548202298050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (688887341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28930 + ... + 47060.

It is an arithmetic number, because the mean of its divisors is an integer number (36717300).

Almost surely, 2^688887345 is an apocalyptic number.

It is an amenable number.

688887345 is a deficient number, since it is larger than the sum of its proper divisors (486066255).

688887345 is a wasteful number, since it uses less digits than its factorization.

688887345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305.

The product of its digits is 10321920, while the sum is 57.

The square root of 688887345 is about 26246.6635022435. The cubic root of 688887345 is about 883.1803590166.

The spelling of 688887345 in words is "six hundred eighty-eight million, eight hundred eighty-seven thousand, three hundred forty-five".