4185385378 has 16 divisors (see below), whose sum is σ = 6353934840. Its totient is φ = 2067446656.

The previous prime is 4185385343. The next prime is 4185385381. The reversal of 4185385378 is 8735835814.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2841209809 + 1344175569 = 53303^2 + 36663^2 .

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, 218100 + ... + 236512.

Almost surely, 2^4185385378 is an apocalyptic number.

4185385378 is a deficient number, since it is larger than the sum of its proper divisors (2168549462).

4185385378 is a wasteful number, since it uses less digits than its factorization.

4185385378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19781.

The product of its digits is 3225600, while the sum is 52.

The square root of 4185385378 is about 64694.5544694451. The cubic root of 4185385378 is about 1611.5550704218. Note that the first 3 decimals are identical.

The spelling of 4185385378 in words is "four billion, one hundred eighty-five million, three hundred eighty-five thousand, three hundred seventy-eight".