628414820 has 24 divisors (see below), whose sum is σ = 1439641728. Its totient is φ = 228514400.

The previous prime is 628414817. The next prime is 628414837. The reversal of 628414820 is 28414826.

628414820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1427996 + ... + 1428435.

It is an arithmetic number, because the mean of its divisors is an integer number (59985072).

Almost surely, 2^628414820 is an apocalyptic number.

It is an amenable number.

628414820 is an abundant number, since it is smaller than the sum of its proper divisors (811226908).

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

628414820 is a wasteful number, since it uses less digits than its factorization.

628414820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856451 (or 2856449 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 628414820 is about 25068.2033660173. The cubic root of 628414820 is about 856.5422820176.

The spelling of 628414820 in words is "six hundred twenty-eight million, four hundred fourteen thousand, eight hundred twenty".