620388446 has 8 divisors (see below), whose sum is σ = 985322880. Its totient is φ = 291947488.

The previous prime is 620388421. The next prime is 620388449. The reversal of 620388446 is 644883026.

620388446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620388449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9123326 + ... + 9123393.

It is an arithmetic number, because the mean of its divisors is an integer number (123165360).

Almost surely, 2^620388446 is an apocalyptic number.

620388446 is a deficient number, since it is larger than the sum of its proper divisors (364934434).

620388446 is a wasteful number, since it uses less digits than its factorization.

620388446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246738.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 620388446 is about 24907.5981579919. The cubic root of 620388446 is about 852.8799410654.

It can be divided in two parts, 6203 and 88446, that added together give a palindrome (94649).

The spelling of 620388446 in words is "six hundred twenty million, three hundred eighty-eight thousand, four hundred forty-six".