621346430 has 32 divisors (see below), whose sum is σ = 1187628480. Its totient is φ = 233244160.

The previous prime is 621346421. The next prime is 621346457. The reversal of 621346430 is 34643126.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621346393 and 621346402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55940 + ... + 66120.

It is an arithmetic number, because the mean of its divisors is an integer number (37113390).

Almost surely, 2^621346430 is an apocalyptic number.

621346430 is a deficient number, since it is larger than the sum of its proper divisors (566282050).

621346430 is a wasteful number, since it uses less digits than its factorization.

621346430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10564.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 621346430 is about 24926.8214981373. The cubic root of 621346430 is about 853.3187119416.

Adding to 621346430 its reverse (34643126), we get a palindrome (655989556).

The spelling of 621346430 in words is "six hundred twenty-one million, three hundred forty-six thousand, four hundred thirty".