654816 has 48 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 206208.

The previous prime is 654803. The next prime is 654817. The reversal of 654816 is 618456.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁶⁵⁴⁸¹⁶ 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 654816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

654816 is an abundant number, since it is smaller than the sum of its proper divisors (1159584).

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

654816 is a wasteful number, since it uses less digits than its factorization.

654816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 383 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 654816 is about 809.2070192479. The cubic root of 654816 is about 86.8373231720.

The spelling of 654816 in words is "six hundred fifty-four thousand, eight hundred sixteen".