628080291 has 16 divisors (see below), whose sum is σ = 955639200. Its totient is φ = 407402784.

The previous prime is 628080281. The next prime is 628080319. The reversal of 628080291 is 192080826.

628080291 is a `hidden beast` number, since 628 + 0 + 8 + 0 + 29 + 1 = 666.

It is not a de Polignac number, because 628080291 - 2⁷ = 628080163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628080221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313356 + ... + 315353.

It is an arithmetic number, because the mean of its divisors is an integer number (59727450).

Almost surely, 2^628080291 is an apocalyptic number.

628080291 is a deficient number, since it is larger than the sum of its proper divisors (327558909).

628080291 is a wasteful number, since it uses less digits than its factorization.

628080291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628755 (or 628749 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 628080291 is about 25061.5301009336. The cubic root of 628080291 is about 856.3902650780.

The spelling of 628080291 in words is "six hundred twenty-eight million, eighty thousand, two hundred ninety-one".