686426588 has 6 divisors (see below), whose sum is σ = 1201246536. Its totient is φ = 343213292.

The previous prime is 686426569. The next prime is 686426593. The reversal of 686426588 is 885624686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85803320 + ... + 85803327.

It is an arithmetic number, because the mean of its divisors is an integer number (200207756).

Almost surely, 2^686426588 is an apocalyptic number.

It is an amenable number.

686426588 is a deficient number, since it is larger than the sum of its proper divisors (514819948).

686426588 is a wasteful number, since it uses less digits than its factorization.

686426588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171606651 (or 171606649 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 53.

The square root of 686426588 is about 26199.7440445513. The cubic root of 686426588 is about 882.1275090188.

The spelling of 686426588 in words is "six hundred eighty-six million, four hundred twenty-six thousand, five hundred eighty-eight".