628789056 has 112 divisors (see below), whose sum is σ = 1911705600. Its totient is φ = 178675200.

The previous prime is 628789033. The next prime is 628789061. The reversal of 628789056 is 650987826.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×628789056² = 790751353890742272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266281 + ... + 268631.

It is an arithmetic number, because the mean of its divisors is an integer number (17068800).

Almost surely, 2^628789056 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 628789056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955852800).

628789056 is an abundant number, since it is smaller than the sum of its proper divisors (1282916544).

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

628789056 is a wasteful number, since it uses less digits than its factorization.

628789056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 628789056 is about 25075.6666112788. Note that the first 4 decimals coincide. The cubic root of 628789056 is about 856.7122787229.

The spelling of 628789056 in words is "six hundred twenty-eight million, seven hundred eighty-nine thousand, fifty-six".