686070 has 120 divisors (see below), whose sum is σ = 2317392. Its totient is φ = 142560.

The previous prime is 686057. The next prime is 686087. The reversal of 686070 is 70686.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 62365 + ... + 62375.

2⁶⁸⁶⁰⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158696).

686070 is an abundant number, since it is smaller than the sum of its proper divisors (1631322).

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

686070 is a wasteful number, since it uses less digits than its factorization.

686070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 686070 is about 828.2934262687. The cubic root of 686070 is about 88.1974732026.

The spelling of 686070 in words is "six hundred eighty-six thousand, seventy".