628887380 has 24 divisors (see below), whose sum is σ = 1440724320. Its totient is φ = 228686240.

The previous prime is 628887379. The next prime is 628887437. The reversal of 628887380 is 83788826.

628887380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429070 + ... + 1429509.

It is an arithmetic number, because the mean of its divisors is an integer number (60030180).

Almost surely, 2^628887380 is an apocalyptic number.

It is an amenable number.

628887380 is an abundant number, since it is smaller than the sum of its proper divisors (811836940).

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

628887380 is a wasteful number, since it uses less digits than its factorization.

628887380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858599 (or 2858597 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 628887380 is about 25077.6270807268. The cubic root of 628887380 is about 856.7569312112.

The spelling of 628887380 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, three hundred eighty".