628209243 has 16 divisors (see below), whose sum is σ = 931172640. Its totient is φ = 418584672.

The previous prime is 628209233. The next prime is 628209269. The reversal of 628209243 is 342902826.

628209243 is a `hidden beast` number, since 628 + 2 + 0 + 9 + 24 + 3 = 666.

It is not a de Polignac number, because 628209243 - 2²² = 624014939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628209198 and 628209207.

It is not an unprimeable number, because it can be changed into a prime (628209233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58005 + ... + 67977.

It is an arithmetic number, because the mean of its divisors is an integer number (58198290).

Almost surely, 2^628209243 is an apocalyptic number.

628209243 is a deficient number, since it is larger than the sum of its proper divisors (302963397).

628209243 is a wasteful number, since it uses less digits than its factorization.

628209243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12315 (or 12309 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 628209243 is about 25064.1026769362. The cubic root of 628209243 is about 856.4488699423.

The spelling of 628209243 in words is "six hundred twenty-eight million, two hundred nine thousand, two hundred forty-three".