685278032 has 20 divisors (see below), whose sum is σ = 1332060576. Its totient is φ = 341520480.

The previous prime is 685278019. The next prime is 685278037. The reversal of 685278032 is 230872586.

It is a super-2 number, since 2×685278032² = 939211962283586048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685278037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64844 + ... + 74667.

Almost surely, 2^685278032 is an apocalyptic number.

It is an amenable number.

685278032 is a deficient number, since it is larger than the sum of its proper divisors (646782544).

685278032 is a wasteful number, since it uses less digits than its factorization.

685278032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139826 (or 139820 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 685278032 is about 26177.8156460771. The cubic root of 685278032 is about 881.6352308542.

The spelling of 685278032 in words is "six hundred eighty-five million, two hundred seventy-eight thousand, thirty-two".