623420 has 48 divisors (see below), whose sum is σ = 1541568. Its totient is φ = 207360.

The previous prime is 623417. The next prime is 623423. The reversal of 623420 is 24326.

It is an interprime number because it is at equal distance from previous prime (623417) and next prime (623423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8504 + ... + 8576.

It is an arithmetic number, because the mean of its divisors is an integer number (32116).

2⁶²³⁴²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770784).

623420 is an abundant number, since it is smaller than the sum of its proper divisors (918148).

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

623420 is a wasteful number, since it uses less digits than its factorization.

623420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 623420 is about 789.5695029571. The cubic root of 623420 is about 85.4266895503.

Adding to 623420 its reverse (24326), we get a palindrome (647746).

The spelling of 623420 in words is "six hundred twenty-three thousand, four hundred twenty".