686653242 has 32 divisors (see below), whose sum is σ = 1549817280. Its totient is φ = 200901120.

The previous prime is 686653237. The next prime is 686653243. The reversal of 686653242 is 242356686.

It is a happy number.

It is a super-2 number, since 2×686653242² = 942985349498221128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686653194 and 686653203.

It is not an unprimeable number, because it can be changed into a prime (686653243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177463 + ... + 181290.

It is an arithmetic number, because the mean of its divisors is an integer number (48431790).

Almost surely, 2^686653242 is an apocalyptic number.

686653242 is an abundant number, since it is smaller than the sum of its proper divisors (863164038).

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

686653242 is a wasteful number, since it uses less digits than its factorization.

686653242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358798.

The product of its digits is 414720, while the sum is 42.

The square root of 686653242 is about 26204.0691878189. The cubic root of 686653242 is about 882.2245894300.

The spelling of 686653242 in words is "six hundred eighty-six million, six hundred fifty-three thousand, two hundred forty-two".