623530 has 16 divisors (see below), whose sum is σ = 1171584. Its totient is φ = 238480.

The previous prime is 623521. The next prime is 623531. The reversal of 623530 is 35326.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 623498 and 623507.

It is not an unprimeable number, because it can be changed into a prime (623531) by changing a digit.

623530 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 7 ways as a sum of consecutive naturals, for example, 1126 + ... + 1585.

It is an arithmetic number, because the mean of its divisors is an integer number (73224).

2⁶²³⁵³⁰ is an apocalyptic number.

623530 is a deficient number, since it is larger than the sum of its proper divisors (548054).

623530 is a wasteful number, since it uses less digits than its factorization.

623530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 623530 is about 789.6391580969. The cubic root of 623530 is about 85.4317136556.

Adding to 623530 its reverse (35326), we get a palindrome (658856).

The spelling of 623530 in words is "six hundred twenty-three thousand, five hundred thirty".