780448145 has 8 divisors (see below), whose sum is σ = 968832360. Its totient is φ = 602828800.

The previous prime is 780448139. The next prime is 780448159. The reversal of 780448145 is 541844087.

It can be written as a sum of positive squares in 4 ways, for example, as 344139601 + 436308544 = 18551^2 + 20888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 780448145 - 2¹⁶ = 780382609 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2691056 + ... + 2691345.

It is an arithmetic number, because the mean of its divisors is an integer number (121104045).

Almost surely, 2^780448145 is an apocalyptic number.

It is an amenable number.

780448145 is a deficient number, since it is larger than the sum of its proper divisors (188384215).

780448145 is a wasteful number, since it uses less digits than its factorization.

780448145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382435.

The product of its (nonzero) digits is 143360, while the sum is 41.

The square root of 780448145 is about 27936.5020179693. The cubic root of 780448145 is about 920.6926671603.

The spelling of 780448145 in words is "seven hundred eighty million, four hundred forty-eight thousand, one hundred forty-five".