621730450 has 48 divisors (see below), whose sum is σ = 1265142240. Its totient is φ = 225440000.

The previous prime is 621730433. The next prime is 621730469. The reversal of 621730450 is 54037126.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219141 + ... + 221959.

It is an arithmetic number, because the mean of its divisors is an integer number (26357130).

Almost surely, 2^621730450 is an apocalyptic number.

621730450 is an abundant number, since it is smaller than the sum of its proper divisors (643411790).

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

621730450 is a wasteful number, since it uses less digits than its factorization.

621730450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 621730450 is about 24934.5232559197. The cubic root of 621730450 is about 853.4944721669.

Adding to 621730450 its reverse (54037126), we get a palindrome (675767576).

The spelling of 621730450 in words is "six hundred twenty-one million, seven hundred thirty thousand, four hundred fifty".