628851380 has 12 divisors (see below), whose sum is σ = 1320587940. Its totient is φ = 251540544.

The previous prime is 628851319. The next prime is 628851397. The reversal of 628851380 is 83158826.

628851380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 436141456 + 192709924 = 20884^2 + 13882^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 15721265 + ... + 15721304.

It is an arithmetic number, because the mean of its divisors is an integer number (110048995).

Almost surely, 2^628851380 is an apocalyptic number.

It is an amenable number.

628851380 is an abundant number, since it is smaller than the sum of its proper divisors (691736560).

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

628851380 is a wasteful number, since it uses less digits than its factorization.

628851380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31442578 (or 31442576 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 628851380 is about 25076.9092991939. The cubic root of 628851380 is about 856.7405828479.

The spelling of 628851380 in words is "six hundred twenty-eight million, eight hundred fifty-one thousand, three hundred eighty".