686507274 has 48 divisors (see below), whose sum is σ = 1508165568. Its totient is φ = 225669696.

The previous prime is 686507249. The next prime is 686507291. The reversal of 686507274 is 472705686.

It is a super-2 number, since 2×686507274² = 942584474509822152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410989 + ... + 412655.

It is an arithmetic number, because the mean of its divisors is an integer number (31420116).

Almost surely, 2^686507274 is an apocalyptic number.

686507274 is an abundant number, since it is smaller than the sum of its proper divisors (821658294).

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

686507274 is a wasteful number, since it uses less digits than its factorization.

686507274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 686507274 is about 26201.2838235076. The cubic root of 686507274 is about 882.1620708850.

The spelling of 686507274 in words is "six hundred eighty-six million, five hundred seven thousand, two hundred seventy-four".