686866152 has 64 divisors (see below), whose sum is σ = 1964666880. Its totient is φ = 196028352.

The previous prime is 686866151. The next prime is 686866177. The reversal of 686866152 is 251668686.

It is a happy number.

It is a super-2 number, since 2×686866152² = 943570221526574208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686866151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203793 + ... + 207135.

It is an arithmetic number, because the mean of its divisors is an integer number (30697920).

Almost surely, 2^686866152 is an apocalyptic number.

It is an amenable number.

686866152 is an abundant number, since it is smaller than the sum of its proper divisors (1277800728).

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

686866152 is a wasteful number, since it uses less digits than its factorization.

686866152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582 (or 4578 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 686866152 is about 26208.1314099270. The cubic root of 686866152 is about 882.3157635556.

The spelling of 686866152 in words is "six hundred eighty-six million, eight hundred sixty-six thousand, one hundred fifty-two".