621306352 has 20 divisors (see below), whose sum is σ = 1213263616. Its totient is φ = 308206080.

The previous prime is 621306349. The next prime is 621306379. The reversal of 621306352 is 253603126.

It is a self number, because there is not a number n which added to its sum of digits gives 621306352.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150849 + ... + 154912.

Almost surely, 2^621306352 is an apocalyptic number.

It is an amenable number.

621306352 is a deficient number, since it is larger than the sum of its proper divisors (591957264).

621306352 is a wasteful number, since it uses less digits than its factorization.

621306352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305896 (or 305890 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 621306352 is about 24926.0175720070. The cubic root of 621306352 is about 853.3003646659.

Adding to 621306352 its reverse (253603126), we get a palindrome (874909478).

The spelling of 621306352 in words is "six hundred twenty-one million, three hundred six thousand, three hundred fifty-two".