628404224 has 156 divisors (see below), whose sum is σ = 1523919168. Its totient is φ = 258048000.

The previous prime is 628404223. The next prime is 628404239. The reversal of 628404224 is 422404826.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (628404223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6221774 + ... + 6221874.

Almost surely, 2^628404224 is an apocalyptic number.

628404224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628404224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761959584).

628404224 is an abundant number, since it is smaller than the sum of its proper divisors (895514944).

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

628404224 is a wasteful number, since it uses less digits than its factorization.

628404224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 628404224 is about 25067.9920216997. The cubic root of 628404224 is about 856.5374678021.

The spelling of 628404224 in words is "six hundred twenty-eight million, four hundred four thousand, two hundred twenty-four".