620244 has 24 divisors (see below), whose sum is σ = 1608320. Its totient is φ = 206712.

The previous prime is 620239. The next prime is 620251. The reversal of 620244 is 442026.

620244 is a `hidden beast` number, since 620 + 2 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

620244 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 7 ways as a sum of consecutive naturals, for example, 2764 + ... + 2979.

2⁶²⁰²⁴⁴ is an apocalyptic number.

It is an amenable number.

620244 is an abundant number, since it is smaller than the sum of its proper divisors (988076).

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

620244 is a wasteful number, since it uses less digits than its factorization.

620244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756 (or 5748 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 620244 is about 787.5557123150. Note that the first 3 decimals coincide. The cubic root of 620244 is about 85.2813743476.

The spelling of 620244 in words is "six hundred twenty thousand, two hundred forty-four".