628458237 has 16 divisors (see below), whose sum is σ = 1015690560. Its totient is φ = 380883600.

The previous prime is 628458203. The next prime is 628458239. The reversal of 628458237 is 732854826.

628458237 is a `hidden beast` number, since 62 + 8 + 4 + 582 + 3 + 7 = 666.

It is not a de Polignac number, because 628458237 - 2¹¹ = 628456189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628458192 and 628458201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628458239) 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, 1057714 + ... + 1058307.

It is an arithmetic number, because the mean of its divisors is an integer number (63480660).

Almost surely, 2^628458237 is an apocalyptic number.

It is an amenable number.

628458237 is a deficient number, since it is larger than the sum of its proper divisors (387232323).

628458237 is a wasteful number, since it uses less digits than its factorization.

628458237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116041 (or 2116035 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 628458237 is about 25069.0693285571. The cubic root of 628458237 is about 856.5620076503.

The spelling of 628458237 in words is "six hundred twenty-eight million, four hundred fifty-eight thousand, two hundred thirty-seven".