628771884 has 96 divisors (see below), whose sum is σ = 1702170624. Its totient is φ = 179055360.

The previous prime is 628771873. The next prime is 628771901. The reversal of 628771884 is 488177826.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108402 + ... + 114054.

It is an arithmetic number, because the mean of its divisors is an integer number (17730944).

Almost surely, 2^628771884 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 628771884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851085312).

628771884 is an abundant number, since it is smaller than the sum of its proper divisors (1073398740).

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

628771884 is a wasteful number, since it uses less digits than its factorization.

628771884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727 (or 5725 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 628771884 is about 25075.3242052820. The cubic root of 628771884 is about 856.7044798186.

The spelling of 628771884 in words is "six hundred twenty-eight million, seven hundred seventy-one thousand, eight hundred eighty-four".