620940 has 48 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 162240.

The previous prime is 620933. The next prime is 620947. The reversal of 620940 is 49026.

620940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620933) and next prime (620947).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620940.

It is not an unprimeable number, because it can be changed into a prime (620947) by changing a digit.

620940 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 in 15 ways as a sum of consecutive naturals, for example, 4675 + ... + 4805.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2⁶²⁰⁹⁴⁰ is an apocalyptic number.

620940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887040).

620940 is an abundant number, since it is smaller than the sum of its proper divisors (1153140).

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

620940 is a wasteful number, since it uses less digits than its factorization.

620940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 620940 is about 787.9974619248. The cubic root of 620940 is about 85.3132616095.

Adding to 620940 its reverse (49026), we get a palindrome (669966).

The spelling of 620940 in words is "six hundred twenty thousand, nine hundred forty".