686266290 has 64 divisors (see below), whose sum is σ = 1832544000. Its totient is φ = 182754432.

The previous prime is 686266279. The next prime is 686266303. The reversal of 686266290 is 92662686.

It is a super-2 number, since 2×686266290² = 941922841580728200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282019 + ... + 284441.

It is an arithmetic number, because the mean of its divisors is an integer number (28633500).

Almost surely, 2^686266290 is an apocalyptic number.

686266290 is an abundant number, since it is smaller than the sum of its proper divisors (1146277710).

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

686266290 is a wasteful number, since it uses less digits than its factorization.

686266290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 686266290 is about 26196.6847139099. The cubic root of 686266290 is about 882.0588372985.

The spelling of 686266290 in words is "six hundred eighty-six million, two hundred sixty-six thousand, two hundred ninety".