654680 has 32 divisors (see below), whose sum is σ = 1587600. Its totient is φ = 241536.

The previous prime is 654679. The next prime is 654697. The reversal of 654680 is 86456.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 1149.

2⁶⁵⁴⁶⁸⁰ 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 654680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793800).

654680 is an abundant number, since it is smaller than the sum of its proper divisors (932920).

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

654680 is a wasteful number, since it uses less digits than its factorization.

654680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 654680 is about 809.1229819996. The cubic root of 654680 is about 86.8313109519.

The spelling of 654680 in words is "six hundred fifty-four thousand, six hundred eighty".