620240 has 20 divisors (see below), whose sum is σ = 1442244. Its totient is φ = 248064.

The previous prime is 620239. The next prime is 620251. The reversal of 620240 is 42026.

620240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 141376 = 692^2 + 376^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3797 + ... + 3956.

2⁶²⁰²⁴⁰ is an apocalyptic number.

It is an amenable number.

620240 is an abundant number, since it is smaller than the sum of its proper divisors (822004).

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

620240 is a wasteful number, since it uses less digits than its factorization.

620240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 7760 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 620240 is about 787.5531728080. The cubic root of 620240 is about 85.2811910186.

Adding to 620240 its reverse (42026), we get a palindrome (662266).

The spelling of 620240 in words is "six hundred twenty thousand, two hundred forty".