620626768 has 20 divisors (see below), whose sum is σ = 1203220980. Its totient is φ = 310118144.

The previous prime is 620626763. The next prime is 620626793. The reversal of 620626768 is 867626026.

It can be written as a sum of positive squares in 2 ways, for example, as 37307664 + 583319104 = 6108^2 + 24152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620626763) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15996 + ... + 38692.

It is an arithmetic number, because the mean of its divisors is an integer number (60161049).

Almost surely, 2^620626768 is an apocalyptic number.

It is an amenable number.

620626768 is a deficient number, since it is larger than the sum of its proper divisors (582594212).

620626768 is a wasteful number, since it uses less digits than its factorization.

620626768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24414 (or 24408 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 620626768 is about 24912.3818210945. The cubic root of 620626768 is about 852.9891382588.

The spelling of 620626768 in words is "six hundred twenty million, six hundred twenty-six thousand, seven hundred sixty-eight".