6128649 has 32 divisors (see below), whose sum is σ = 9676800. Its totient is φ = 3825360.

The previous prime is 6128623. The next prime is 6128651. The reversal of 6128649 is 9468216.

6128649 is a `hidden beast` number, since 6 + 1 + 2 + 8 + 649 = 666.

It is not a de Polignac number, because 6128649 - 2⁹ = 6128137 is a prime.

6128649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6128149) 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, 44022 + ... + 44160.

It is an arithmetic number, because the mean of its divisors is an integer number (302400).

Almost surely, 2^6128649 is an apocalyptic number.

6128649 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6128649 is a deficient number, since it is larger than the sum of its proper divisors (3548151).

6128649 is a wasteful number, since it uses less digits than its factorization.

6128649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 236 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 6128649 is about 2475.6108337136. The cubic root of 6128649 is about 183.0016124556.

It can be divided in two parts, 612 and 8649, that added together give a cube (9261 = 21³).

The spelling of 6128649 in words is "six million, one hundred twenty-eight thousand, six hundred forty-nine".