686243100 has 36 divisors (see below), whose sum is σ = 1985530904. Its totient is φ = 182998080.

The previous prime is 686243053. The next prime is 686243119. The reversal of 686243100 is 1342686.

It is a super-2 number, since 2×686243100² = 941859184595220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1143439 + ... + 1144038.

Almost surely, 2^686243100 is an apocalyptic number.

686243100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686243100 is an abundant number, since it is smaller than the sum of its proper divisors (1299287804).

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

686243100 is a wasteful number, since it uses less digits than its factorization.

686243100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287494 (or 2287487 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 686243100 is about 26196.2420969115. The cubic root of 686243100 is about 882.0489018089.

Adding to 686243100 its reverse (1342686), we get a palindrome (687585786).

The spelling of 686243100 in words is "six hundred eighty-six million, two hundred forty-three thousand, one hundred".