627448989 has 32 divisors (see below), whose sum is σ = 900914560. Its totient is φ = 387244800.

The previous prime is 627448981. The next prime is 627448999. The reversal of 627448989 is 989844726.

627448989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 627448989 - 2³ = 627448981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627448981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628839 + ... + 629835.

It is an arithmetic number, because the mean of its divisors is an integer number (28153580).

Almost surely, 2^627448989 is an apocalyptic number.

It is an amenable number.

627448989 is a deficient number, since it is larger than the sum of its proper divisors (273465571).

627448989 is a wasteful number, since it uses less digits than its factorization.

627448989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its digits is 6967296, while the sum is 57.

The square root of 627448989 is about 25048.9318933962. The cubic root of 627448989 is about 856.1032411979.

The spelling of 627448989 in words is "six hundred twenty-seven million, four hundred forty-eight thousand, nine hundred eighty-nine".