621958368 has 24 divisors (see below), whose sum is σ = 1632640968. Its totient is φ = 207319424.

The previous prime is 621958343. The next prime is 621958417. The reversal of 621958368 is 863859126.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 3239271 + ... + 3239462.

It is an arithmetic number, because the mean of its divisors is an integer number (68026707).

Almost surely, 2^621958368 is an apocalyptic number.

It is an amenable number.

621958368 is an abundant number, since it is smaller than the sum of its proper divisors (1010682600).

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

621958368 is a wasteful number, since it uses less digits than its factorization.

621958368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6478746 (or 6478738 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 621958368 is about 24939.0931671543. The cubic root of 621958368 is about 853.5987526139.

The spelling of 621958368 in words is "six hundred twenty-one million, nine hundred fifty-eight thousand, three hundred sixty-eight".