686420888 has 32 divisors (see below), whose sum is σ = 1316884800. Its totient is φ = 335342592.

The previous prime is 686420881. The next prime is 686420909. The reversal of 686420888 is 888024686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686420881) 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, 55706 + ... + 66902.

It is an arithmetic number, because the mean of its divisors is an integer number (41152650).

Almost surely, 2^686420888 is an apocalyptic number.

It is an amenable number.

686420888 is a deficient number, since it is larger than the sum of its proper divisors (630463912).

686420888 is a wasteful number, since it uses less digits than its factorization.

686420888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11379 (or 11375 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 50.

The square root of 686420888 is about 26199.6352646368. The cubic root of 686420888 is about 882.1250673201.

The spelling of 686420888 in words is "six hundred eighty-six million, four hundred twenty thousand, eight hundred eighty-eight".