628704450 has 96 divisors (see below), whose sum is σ = 1889968320. Its totient is φ = 152409600.

The previous prime is 628704449. The next prime is 628704451. The reversal of 628704450 is 54407826.

It is an interprime number because it is at equal distance from previous prime (628704449) and next prime (628704451).

It is not an unprimeable number, because it can be changed into a prime (628704451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6319 + ... + 36018.

It is an arithmetic number, because the mean of its divisors is an integer number (19687170).

Almost surely, 2^628704450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628704450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944984160).

628704450 is an abundant number, since it is smaller than the sum of its proper divisors (1261263870).

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

628704450 is a wasteful number, since it uses less digits than its factorization.

628704450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42369 (or 42358 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 628704450 is about 25073.9795405516. The cubic root of 628704450 is about 856.6738523490.

It can be divided in two parts, 628 and 704450, that added together give a triangular number (705078 = T₁₁₈₇).

The spelling of 628704450 in words is "six hundred twenty-eight million, seven hundred four thousand, four hundred fifty".