620623530 has 24 divisors (see below), whose sum is σ = 1613621412. Its totient is φ = 165499584.

The previous prime is 620623529. The next prime is 620623571. The reversal of 620623530 is 35326026.

620623530 is a `hidden beast` number, since 6 + 2 + 0 + 623 + 5 + 30 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 609151761 + 11471769 = 24681^2 + 3387^2 .

It is a super-3 number, since 3×620623530³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620623494 and 620623503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3447819 + ... + 3447998.

Almost surely, 2^620623530 is an apocalyptic number.

620623530 is an abundant number, since it is smaller than the sum of its proper divisors (992997882).

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

620623530 is a wasteful number, since it uses less digits than its factorization.

620623530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895830 (or 6895827 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 620623530 is about 24912.3168332454. The cubic root of 620623530 is about 852.9876548210.

Adding to 620623530 its reverse (35326026), we get a palindrome (655949556).

The spelling of 620623530 in words is "six hundred twenty million, six hundred twenty-three thousand, five hundred thirty".