686379256 has 32 divisors (see below), whose sum is σ = 1380272400. Its totient is φ = 318988800.

The previous prime is 686379251. The next prime is 686379257. The reversal of 686379256 is 652973686.

It is a super-2 number, since 2×686379256² = 942232966134227072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686379251) 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, 34545 + ... + 50656.

Almost surely, 2^686379256 is an apocalyptic number.

It is an amenable number.

686379256 is an abundant number, since it is smaller than the sum of its proper divisors (693893144).

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

686379256 is a wasteful number, since it uses less digits than its factorization.

686379256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85279 (or 85275 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The square root of 686379256 is about 26198.8407377120. The cubic root of 686379256 is about 882.1072330856.

The spelling of 686379256 in words is "six hundred eighty-six million, three hundred seventy-nine thousand, two hundred fifty-six".