686504142 has 24 divisors (see below), whose sum is σ = 1527627816. Its totient is φ = 222649776.

The previous prime is 686504141. The next prime is 686504173. The reversal of 686504142 is 241405686.

686504142 is a `hidden beast` number, since 6 + 8 + 6 + 504 + 142 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 686504097 and 686504106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686504141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514728 + ... + 516059.

It is an arithmetic number, because the mean of its divisors is an integer number (63651159).

Almost surely, 2^686504142 is an apocalyptic number.

686504142 is an abundant number, since it is smaller than the sum of its proper divisors (841123674).

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

686504142 is a wasteful number, since it uses less digits than its factorization.

686504142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030832 (or 1030829 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 686504142 is about 26201.2240553757. The cubic root of 686504142 is about 882.1607293426.

The spelling of 686504142 in words is "six hundred eighty-six million, five hundred four thousand, one hundred forty-two".