384785915 has 4 divisors (see below), whose sum is σ = 461743104. Its totient is φ = 307828728.

The previous prime is 384785911. The next prime is 384785917. The reversal of 384785915 is 519587483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 384785915 - 2² = 384785911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384785911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38478587 + ... + 38478596.

It is an arithmetic number, because the mean of its divisors is an integer number (115435776).

Almost surely, 2^384785915 is an apocalyptic number.

384785915 is a deficient number, since it is larger than the sum of its proper divisors (76957189).

384785915 is an equidigital number, since it uses as much as digits as its factorization.

384785915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76957188.

The product of its digits is 1209600, while the sum is 50.

The square root of 384785915 is about 19615.9607208008. The cubic root of 384785915 is about 727.3437680912.

The spelling of 384785915 in words is "three hundred eighty-four million, seven hundred eighty-five thousand, nine hundred fifteen".