6427978446 has 16 divisors (see below), whose sum is σ = 12865008384. Its totient is φ = 2141150904.

The previous prime is 6427978399. The next prime is 6427978457. The reversal of 6427978446 is 6448797246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367896 + ... + 384971.

It is an arithmetic number, because the mean of its divisors is an integer number (804063024).

Almost surely, 2^6427978446 is an apocalyptic number.

6427978446 is an abundant number, since it is smaller than the sum of its proper divisors (6437029938).

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

6427978446 is a wasteful number, since it uses less digits than its factorization.

6427978446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754295.

The product of its digits is 16257024, while the sum is 57.

The square root of 6427978446 is about 80174.6745924173. The cubic root of 6427978446 is about 1859.3371097148.

The spelling of 6427978446 in words is "six billion, four hundred twenty-seven million, nine hundred seventy-eight thousand, four hundred forty-six".