654788 has 6 divisors (see below), whose sum is σ = 1145886. Its totient is φ = 327392.

The previous prime is 654781. The next prime is 654799. The reversal of 654788 is 887456.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 43264 = 782^2 + 208^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (654781) by changing a digit.

654788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81845 + ... + 81852.

It is an arithmetic number, because the mean of its divisors is an integer number (190981).

2⁶⁵⁴⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

654788 is a deficient number, since it is larger than the sum of its proper divisors (491098).

654788 is a wasteful number, since it uses less digits than its factorization.

654788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163701 (or 163699 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 654788 is about 809.1897181749. The cubic root of 654788 is about 86.8360854300.

The spelling of 654788 in words is "six hundred fifty-four thousand, seven hundred eighty-eight".