628272656 has 60 divisors (see below), whose sum is σ = 1369297776. Its totient is φ = 278900160.

The previous prime is 628272607. The next prime is 628272719. The reversal of 628272656 is 656272826.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79475 + ... + 87021.

Almost surely, 2^628272656 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 628272656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684648888).

628272656 is an abundant number, since it is smaller than the sum of its proper divisors (741025120).

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

628272656 is a wasteful number, since it uses less digits than its factorization.

628272656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620 (or 7603 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 628272656 is about 25065.3676613769. The cubic root of 628272656 is about 856.4776863308.

The spelling of 628272656 in words is "six hundred twenty-eight million, two hundred seventy-two thousand, six hundred fifty-six".