628311100 has 108 divisors (see below), whose sum is σ = 1463670208. Its totient is φ = 233856000.

The previous prime is 628311083. The next prime is 628311107. The reversal of 628311100 is 1113826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628311107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2606980 + ... + 2607220.

Almost surely, 2^628311100 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 628311100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731835104).

628311100 is an abundant number, since it is smaller than the sum of its proper divisors (835359108).

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

628311100 is a wasteful number, since it uses less digits than its factorization.

628311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 628311100 is about 25066.1345244934. The cubic root of 628311100 is about 856.4951552627.

Adding to 628311100 its reverse (1113826), we get a palindrome (629424926).

The spelling of 628311100 in words is "six hundred twenty-eight million, three hundred eleven thousand, one hundred".