620340 has 72 divisors (see below), whose sum is σ = 2030112. Its totient is φ = 141120.

The previous prime is 620329. The next prime is 620351. The reversal of 620340 is 43026.

620340 = T₂₃₉ + T₂₄₀ + ... + T₂₅₈.

It is an interprime number because it is at equal distance from previous prime (620329) and next prime (620351).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable 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 23 ways as a sum of consecutive naturals, for example, 2835 + ... + 3045.

It is an arithmetic number, because the mean of its divisors is an integer number (28196).

2⁶²⁰³⁴⁰ is an apocalyptic number.

620340 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 620340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015056).

620340 is an abundant number, since it is smaller than the sum of its proper divisors (1409772).

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

620340 is a wasteful number, since it uses less digits than its factorization.

620340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 620340 is about 787.6166580260. The cubic root of 620340 is about 85.2857740084.

Adding to 620340 its reverse (43026), we get a palindrome (663366).

The spelling of 620340 in words is "six hundred twenty thousand, three hundred forty".