620444 has 24 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 276080.

The previous prime is 620441. The next prime is 620461. The reversal of 620444 is 444026.

620444 = T₇₂ + T₇₃ + ... + T₁₅₉.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620441) 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, 2477 + ... + 2715.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁶²⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

620444 is a deficient number, since it is larger than the sum of its proper divisors (589156).

620444 is a wasteful number, since it uses less digits than its factorization.

620444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 620444 is about 787.6826772248. The cubic root of 620444 is about 85.2905397954.

The spelling of 620444 in words is "six hundred twenty thousand, four hundred forty-four".