686450448 has 30 divisors (see below), whose sum is σ = 1921108254. Its totient is φ = 228816768.

The previous prime is 686450447. The next prime is 686450459. The reversal of 686450448 is 844054686.

It can be written as a sum of positive squares in only one way, i.e., 681836544 + 4613904 = 26112^2 + 2148^2 .

It is not an unprimeable number, because it can be changed into a prime (686450441) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2383365 + ... + 2383652.

Almost surely, 2^686450448 is an apocalyptic number.

It is an amenable number.

686450448 is an abundant number, since it is smaller than the sum of its proper divisors (1234657806).

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

686450448 is a wasteful number, since it uses less digits than its factorization.

686450448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4767031 (or 4767022 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 686450448 is about 26200.1993885543. The cubic root of 686450448 is about 882.1377297372.

The spelling of 686450448 in words is "six hundred eighty-six million, four hundred fifty thousand, four hundred forty-eight".