626240020 has 24 divisors (see below), whose sum is σ = 1502976384. Its totient is φ = 214710816.

The previous prime is 626240009. The next prime is 626240047. The reversal of 626240020 is 20042626.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 626239973 and 626240000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236432 + ... + 2236711.

It is an arithmetic number, because the mean of its divisors is an integer number (62624016).

Almost surely, 2^626240020 is an apocalyptic number.

It is an amenable number.

626240020 is an abundant number, since it is smaller than the sum of its proper divisors (876736364).

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

626240020 is a wasteful number, since it uses less digits than its factorization.

626240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473159 (or 4473157 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 626240020 is about 25024.7881109911. The cubic root of 626240020 is about 855.5530409651.

Adding to 626240020 its reverse (20042626), we get a palindrome (646282646).

The spelling of 626240020 in words is "six hundred twenty-six million, two hundred forty thousand, twenty".