686450480 has 80 divisors (see below), whose sum is σ = 1703221344. Its totient is φ = 256389120.

The previous prime is 686450477. The next prime is 686450489. The reversal of 686450480 is 84054686.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×686450480² = 942428522984460800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686450489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176234 + ... + 180086.

Almost surely, 2^686450480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686450480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851610672).

686450480 is an abundant number, since it is smaller than the sum of its proper divisors (1016770864).

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

686450480 is a wasteful number, since it uses less digits than its factorization.

686450480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 686450480 is about 26200.1999992366. The cubic root of 686450480 is about 882.1377434446.

The spelling of 686450480 in words is "six hundred eighty-six million, four hundred fifty thousand, four hundred eighty".