6449620 has 24 divisors (see below), whose sum is σ = 13595400. Its totient is φ = 2570112.

The previous prime is 6449617. The next prime is 6449659. The reversal of 6449620 is 269446.

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 6140484 = 556^2 + 2478^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7366 + ... + 8194.

It is an arithmetic number, because the mean of its divisors is an integer number (566475).

Almost surely, 2^6449620 is an apocalyptic number.

It is an amenable number.

6449620 is an abundant number, since it is smaller than the sum of its proper divisors (7145780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6449620 is a wasteful number, since it uses less digits than its factorization.

6449620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6449620 is about 2539.6102063112. The cubic root of 6449620 is about 186.1421428582.

It can be divided in two parts, 64496 and 20, that added together give a square (64516 = 254²).

The spelling of 6449620 in words is "six million, four hundred forty-nine thousand, six hundred twenty".