628779996 has 216 divisors, whose sum is σ = 1890259280. Its totient is φ = 181398528.

The previous prime is 628779979. The next prime is 628779997. The reversal of 628779996 is 699977826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628779997) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6482220 + ... + 6482316.

Almost surely, 2^628779996 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 628779996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945129640).

628779996 is an abundant number, since it is smaller than the sum of its proper divisors (1261479284).

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

628779996 is a wasteful number, since it uses less digits than its factorization.

628779996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 134 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 628779996 is about 25075.4859574047. The cubic root of 628779996 is about 856.7081640147.

The spelling of 628779996 in words is "six hundred twenty-eight million, seven hundred seventy-nine thousand, nine hundred ninety-six".