686116470 has 64 divisors (see below), whose sum is σ = 1777003200. Its totient is φ = 168542208.

The previous prime is 686116469. The next prime is 686116489. The reversal of 686116470 is 74611686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223506 + ... + 226554.

It is an arithmetic number, because the mean of its divisors is an integer number (27765675).

Almost surely, 2^686116470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686116470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888501600).

686116470 is an abundant number, since it is smaller than the sum of its proper divisors (1090886730).

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

686116470 is a wasteful number, since it uses less digits than its factorization.

686116470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 686116470 is about 26193.8250356835. The cubic root of 686116470 is about 881.9946446886.

The spelling of 686116470 in words is "six hundred eighty-six million, one hundred sixteen thousand, four hundred seventy".