623620 has 12 divisors (see below), whose sum is σ = 1309644. Its totient is φ = 249440.

The previous prime is 623617. The next prime is 623621. The reversal of 623620 is 26326.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 529984 = 306^2 + 728^2 .

It is not an unprimeable number, because it can be changed into a prime (623621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15571 + ... + 15610.

It is an arithmetic number, because the mean of its divisors is an integer number (109137).

2⁶²³⁶²⁰ is an apocalyptic number.

It is an amenable number.

623620 is an abundant number, since it is smaller than the sum of its proper divisors (686024).

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

623620 is a wasteful number, since it uses less digits than its factorization.

623620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31190 (or 31188 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 623620 is about 789.6961440959. The cubic root of 623620 is about 85.4358238477.

Adding to 623620 its reverse (26326), we get a palindrome (649946).

The spelling of 623620 in words is "six hundred twenty-three thousand, six hundred twenty".