4079420865 has 144 divisors (see below), whose sum is σ = 8093358000. Its totient is φ = 1897039872.

The previous prime is 4079420843. The next prime is 4079420927. The reversal of 4079420865 is 5680249704.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 2883367809 + 1196053056 = 53697^2 + 34584^2 .

It is not a de Polignac number, because 4079420865 - 2⁵ = 4079420833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4079420865.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11688711 + ... + 11689059.

It is an arithmetic number, because the mean of its divisors is an integer number (56203875).

Almost surely, 2^4079420865 is an apocalyptic number.

4079420865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4079420865 is a deficient number, since it is larger than the sum of its proper divisors (4013937135).

4079420865 is a wasteful number, since it uses less digits than its factorization.

4079420865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 4079420865 is about 63870.3441747420. The cubic root of 4079420865 is about 1597.8383392931.

The spelling of 4079420865 in words is "four billion, seventy-nine million, four hundred twenty thousand, eight hundred sixty-five".