384780785 has 8 divisors (see below), whose sum is σ = 463314600. Its totient is φ = 306772864.

The previous prime is 384780757. The next prime is 384780793. The reversal of 384780785 is 587087483.

It can be written as a sum of positive squares in 4 ways, for example, as 164762896 + 220017889 = 12836^2 + 14833^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 384780785 - 2²⁴ = 368003569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129860 + ... + 132789.

It is an arithmetic number, because the mean of its divisors is an integer number (57914325).

Almost surely, 2^384780785 is an apocalyptic number.

It is an amenable number.

384780785 is a deficient number, since it is larger than the sum of its proper divisors (78533815).

384780785 is a wasteful number, since it uses less digits than its factorization.

384780785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262947.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The square root of 384780785 is about 19615.8299594995. The cubic root of 384780785 is about 727.3405357396.

The spelling of 384780785 in words is "three hundred eighty-four million, seven hundred eighty thousand, seven hundred eighty-five".