780385135 has 8 divisors (see below), whose sum is σ = 937467216. Its totient is φ = 623638080.

The previous prime is 780385121. The next prime is 780385141. The reversal of 780385135 is 531583087.

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

It is not a de Polignac number, because 780385135 - 2¹⁷ = 780254063 is a prime.

It is a Duffinian 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, 78601 + ... + 87970.

It is an arithmetic number, because the mean of its divisors is an integer number (117183402).

Almost surely, 2^780385135 is an apocalyptic number.

780385135 is a deficient number, since it is larger than the sum of its proper divisors (157082081).

780385135 is a wasteful number, since it uses less digits than its factorization.

780385135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167513.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 780385135 is about 27935.3742591718. The cubic root of 780385135 is about 920.6678889152.

The spelling of 780385135 in words is "seven hundred eighty million, three hundred eighty-five thousand, one hundred thirty-five".