654628 has 12 divisors (see below), whose sum is σ = 1233820. Its totient is φ = 302112.

The previous prime is 654623. The next prime is 654629. The reversal of 654628 is 826456.

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 580644 = 272^2 + 762^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 654628.

It is not an unprimeable number, because it can be changed into a prime (654623) by changing a digit.

654628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6243 + ... + 6346.

2⁶⁵⁴⁶²⁸ is an apocalyptic number.

It is an amenable number.

654628 is a deficient number, since it is larger than the sum of its proper divisors (579192).

654628 is a wasteful number, since it uses less digits than its factorization.

654628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12606 (or 12604 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 654628 is about 809.0908478039. The cubic root of 654628 is about 86.8290119419.

The spelling of 654628 in words is "six hundred fifty-four thousand, six hundred twenty-eight".