628464280 has 16 divisors (see below), whose sum is σ = 1414044720. Its totient is φ = 251385696.

The previous prime is 628464251. The next prime is 628464329. The reversal of 628464280 is 82464826.

628464280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 15711607 = 628464280 / (6 + 2 + 8 + 4 + 6 + 4 + 2 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7855764 + ... + 7855843.

It is an arithmetic number, because the mean of its divisors is an integer number (88377795).

Almost surely, 2^628464280 is an apocalyptic number.

It is an amenable number.

628464280 is an abundant number, since it is smaller than the sum of its proper divisors (785580440).

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

628464280 is a wasteful number, since it uses less digits than its factorization.

628464280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711618 (or 15711614 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 628464280 is about 25069.1898552785. The cubic root of 628464280 is about 856.5647530927.

The spelling of 628464280 in words is "six hundred twenty-eight million, four hundred sixty-four thousand, two hundred eighty".