684490560 has 168 divisors, whose sum is σ = 2353848480. Its totient is φ = 168450048.

The previous prime is 684490507. The next prime is 684490591. The reversal of 684490560 is 65094486.

It is a super-2 number, since 2×684490560² = 937054653458227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160131 + ... + 164349.

Almost surely, 2^684490560 is an apocalyptic number.

684490560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684490560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176924240).

684490560 is an abundant number, since it is smaller than the sum of its proper divisors (1669357920).

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

684490560 is a wasteful number, since it uses less digits than its factorization.

684490560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 684490560 is about 26162.7704954961. The cubic root of 684490560 is about 881.2973975815.

The spelling of 684490560 in words is "six hundred eighty-four million, four hundred ninety thousand, five hundred sixty".