686406896 has 30 divisors (see below), whose sum is σ = 1547043840. Its totient is φ = 294174048.

The previous prime is 686406883. The next prime is 686406911. The reversal of 686406896 is 698604686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436976 + ... + 438543.

It is an arithmetic number, because the mean of its divisors is an integer number (51568128).

Almost surely, 2^686406896 is an apocalyptic number.

It is an amenable number.

686406896 is an abundant number, since it is smaller than the sum of its proper divisors (860636944).

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

686406896 is a wasteful number, since it uses less digits than its factorization.

686406896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875541 (or 875528 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The square root of 686406896 is about 26199.3682366579. The cubic root of 686406896 is about 882.1190735350.

The spelling of 686406896 in words is "six hundred eighty-six million, four hundred six thousand, eight hundred ninety-six".