686869848 has 256 divisors, whose sum is σ = 2273280000. Its totient is φ = 192036096.

The previous prime is 686869847. The next prime is 686869849. The reversal of 686869848 is 848968686.

It is an interprime number because it is at equal distance from previous prime (686869847) and next prime (686869849).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686869847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5408361 + ... + 5408487.

It is an arithmetic number, because the mean of its divisors is an integer number (8880000).

Almost surely, 2^686869848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686869848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136640000).

686869848 is an abundant number, since it is smaller than the sum of its proper divisors (1586410152).

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

686869848 is a wasteful number, since it uses less digits than its factorization.

686869848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 212 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 63.

The square root of 686869848 is about 26208.2019222991. The cubic root of 686869848 is about 882.3173461217.

The spelling of 686869848 in words is "six hundred eighty-six million, eight hundred sixty-nine thousand, eight hundred forty-eight".