628271384 has 32 divisors (see below), whose sum is σ = 1275750000. Its totient is φ = 288342912.

The previous prime is 628271377. The next prime is 628271401. The reversal of 628271384 is 483172826.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1742 + ... + 35490.

Almost surely, 2^628271384 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 628271384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637875000).

628271384 is an abundant number, since it is smaller than the sum of its proper divisors (647478616).

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

628271384 is a wasteful number, since it uses less digits than its factorization.

628271384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33947 (or 33943 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 628271384 is about 25065.3422877087. The cubic root of 628271384 is about 856.4771083226.

The spelling of 628271384 in words is "six hundred twenty-eight million, two hundred seventy-one thousand, three hundred eighty-four".