628437500 has 48 divisors (see below), whose sum is σ = 1375387104. Its totient is φ = 251250000.

The previous prime is 628437499. The next prime is 628437503. The reversal of 628437500 is 5734826.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628437503) by changing a digit.

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, 311495 + ... + 313505.

It is an arithmetic number, because the mean of its divisors is an integer number (28653898).

Almost surely, 2^628437500 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 628437500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687693552).

628437500 is an abundant number, since it is smaller than the sum of its proper divisors (746949604).

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

628437500 is an frugal number, since it uses more digits than its factorization.

628437500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 628437500 is about 25068.6557278207. The cubic root of 628437500 is about 856.5525863286.

The spelling of 628437500 in words is "six hundred twenty-eight million, four hundred thirty-seven thousand, five hundred".