628227840 has 72 divisors (see below), whose sum is σ = 2006414928. Its totient is φ = 167526400.

The previous prime is 628227827. The next prime is 628227851. The reversal of 628227840 is 48722826.

628227840 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, 77961 + ... + 85640.

It is an arithmetic number, because the mean of its divisors is an integer number (27866874).

Almost surely, 2^628227840 is an apocalyptic number.

628227840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628227840 is an abundant number, since it is smaller than the sum of its proper divisors (1378187088).

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

628227840 is a wasteful number, since it uses less digits than its factorization.

628227840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163625 (or 163611 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 628227840 is about 25064.4736629358. The cubic root of 628227840 is about 856.4573210662.

The spelling of 628227840 in words is "six hundred twenty-eight million, two hundred twenty-seven thousand, eight hundred forty".