686064732 has 12 divisors (see below), whose sum is σ = 1600817736. Its totient is φ = 228688240.

The previous prime is 686064727. The next prime is 686064737. The reversal of 686064732 is 237460686.

It is an interprime number because it is at equal distance from previous prime (686064727) and next prime (686064737).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686064737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28586019 + ... + 28586042.

It is an arithmetic number, because the mean of its divisors is an integer number (133401478).

Almost surely, 2^686064732 is an apocalyptic number.

It is an amenable number.

686064732 is an abundant number, since it is smaller than the sum of its proper divisors (914753004).

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

686064732 is a wasteful number, since it uses less digits than its factorization.

686064732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57172068 (or 57172066 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 686064732 is about 26192.8374178896. The cubic root of 686064732 is about 881.9724746013.

The spelling of 686064732 in words is "six hundred eighty-six million, sixty-four thousand, seven hundred thirty-two".