628771104 has 144 divisors (see below), whose sum is σ = 2027188800. Its totient is φ = 183264768.

The previous prime is 628771001. The next prime is 628771111. The reversal of 628771104 is 401177826.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66717 + ... + 75555.

It is an arithmetic number, because the mean of its divisors is an integer number (14077700).

Almost surely, 2^628771104 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 628771104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013594400).

628771104 is an abundant number, since it is smaller than the sum of its proper divisors (1398417696).

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

628771104 is a wasteful number, since it uses less digits than its factorization.

628771104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8887 (or 8876 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 628771104 is about 25075.3086521383. The cubic root of 628771104 is about 856.7041255673.

The spelling of 628771104 in words is "six hundred twenty-eight million, seven hundred seventy-one thousand, one hundred four".