628822460 has 48 divisors (see below), whose sum is σ = 1515132864. Its totient is φ = 214745088.

The previous prime is 628822459. The next prime is 628822463. The reversal of 628822460 is 64228826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628822463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27242 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (31565268).

Almost surely, 2^628822460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628822460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757566432).

628822460 is an abundant number, since it is smaller than the sum of its proper divisors (886310404).

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

628822460 is a wasteful number, since it uses less digits than its factorization.

628822460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17750 (or 17748 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 628822460 is about 25076.3326664806. The cubic root of 628822460 is about 856.7274492108.

The spelling of 628822460 in words is "six hundred twenty-eight million, eight hundred twenty-two thousand, four hundred sixty".