621393484 has 24 divisors (see below), whose sum is σ = 1135622880. Its totient is φ = 296951424.

The previous prime is 621393449. The next prime is 621393517. The reversal of 621393484 is 484393126.

It is a happy number.

It is a super-2 number, since 2×621393484² = 772259723915316512, which contains 22 as substring.

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, 181662 + ... + 185050.

It is an arithmetic number, because the mean of its divisors is an integer number (47317620).

Almost surely, 2^621393484 is an apocalyptic number.

It is an amenable number.

621393484 is a deficient number, since it is larger than the sum of its proper divisors (514229396).

621393484 is a wasteful number, since it uses less digits than its factorization.

621393484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5409 (or 5407 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 621393484 is about 24927.7653230289. The cubic root of 621393484 is about 853.3402517478.

The spelling of 621393484 in words is "six hundred twenty-one million, three hundred ninety-three thousand, four hundred eighty-four".