685832450 has 12 divisors (see below), whose sum is σ = 1275648450. Its totient is φ = 274332960.

The previous prime is 685832449. The next prime is 685832453. The reversal of 685832450 is 54238586.

It can be written as a sum of positive squares in 3 ways, for example, as 653876041 + 31956409 = 25571^2 + 5653^2 .

It is a super-2 number, since 2×685832450² = 940732298946005000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685832398 and 685832407.

It is not an unprimeable number, because it can be changed into a prime (685832453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6858275 + ... + 6858374.

Almost surely, 2^685832450 is an apocalyptic number.

685832450 is a deficient number, since it is larger than the sum of its proper divisors (589816000).

685832450 is a wasteful number, since it uses less digits than its factorization.

685832450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716661 (or 13716656 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 685832450 is about 26188.4029677260. The cubic root of 685832450 is about 881.8729264364.

The spelling of 685832450 in words is "six hundred eighty-five million, eight hundred thirty-two thousand, four hundred fifty".