6446730 has 16 divisors (see below), whose sum is σ = 15472224. Its totient is φ = 1719120.

The previous prime is 6446711. The next prime is 6446731. The reversal of 6446730 is 376446.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 214891 = 6446730 / (6 + 4 + 4 + 6 + 7 + 3 + 0).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (6446731) by changing a digit.

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, 107416 + ... + 107475.

It is an arithmetic number, because the mean of its divisors is an integer number (967014).

Almost surely, 2^6446730 is an apocalyptic number.

6446730 is an abundant number, since it is smaller than the sum of its proper divisors (9025494).

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

6446730 is a wasteful number, since it uses less digits than its factorization.

6446730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214901.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 6446730 is about 2539.0411576026. The cubic root of 6446730 is about 186.1143359919.

The spelling of 6446730 in words is "six million, four hundred forty-six thousand, seven hundred thirty".