628807760 has 80 divisors (see below), whose sum is σ = 1673988096. Its totient is φ = 215184384.

The previous prime is 628807759. The next prime is 628807763. The reversal of 628807760 is 67708826.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628807763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577937 + ... + 579023.

Almost surely, 2^628807760 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 628807760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836994048).

628807760 is an abundant number, since it is smaller than the sum of its proper divisors (1045180336).

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

628807760 is a wasteful number, since it uses less digits than its factorization.

628807760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 628807760 is about 25076.0395597072. The cubic root of 628807760 is about 856.7207732450.

The spelling of 628807760 in words is "six hundred twenty-eight million, eight hundred seven thousand, seven hundred sixty".