628091008 has 32 divisors (see below), whose sum is σ = 1258810560. Its totient is φ = 312154368.

The previous prime is 628090979. The next prime is 628091011. The reversal of 628091008 is 800190826.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6685 + ... + 36067.

It is an arithmetic number, because the mean of its divisors is an integer number (39337830).

Almost surely, 2^628091008 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 628091008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629405280).

628091008 is an abundant number, since it is smaller than the sum of its proper divisors (630719552).

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

628091008 is a wasteful number, since it uses less digits than its factorization.

628091008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29564 (or 29552 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 628091008 is about 25061.7439137822. The cubic root of 628091008 is about 856.3951359427.

The spelling of 628091008 in words is "six hundred twenty-eight million, ninety-one thousand, eight".