622740 has 48 divisors (see below), whose sum is σ = 1778112. Its totient is φ = 162816.

The previous prime is 622729. The next prime is 622751. The reversal of 622740 is 47226.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (622729) and next prime (622751).

It is a congruent number.

It is an unprimeable number.

622740 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, 5767 + ... + 5873.

It is an arithmetic number, because the mean of its divisors is an integer number (37044).

2⁶²²⁷⁴⁰ is an apocalyptic number.

622740 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 622740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889056).

622740 is an abundant number, since it is smaller than the sum of its proper divisors (1155372).

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

622740 is a wasteful number, since it uses less digits than its factorization.

622740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 622740 is about 789.1387710663. The cubic root of 622740 is about 85.3956183182.

Adding to 622740 its reverse (47226), we get a palindrome (669966).

The spelling of 622740 in words is "six hundred twenty-two thousand, seven hundred forty".