3855778378 has 8 divisors (see below), whose sum is σ = 5809603968. Its totient is φ = 1919243724.

The previous prime is 3855778369. The next prime is 3855778387. The reversal of 3855778378 is 8738775583.

It is an interprime number because it is at equal distance from previous prime (3855778369) and next prime (3855778387).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322176 + ... + 4323067.

It is an arithmetic number, because the mean of its divisors is an integer number (726200496).

Almost surely, 2^3855778378 is an apocalyptic number.

3855778378 is a deficient number, since it is larger than the sum of its proper divisors (1953825590).

3855778378 is a wasteful number, since it uses less digits than its factorization.

3855778378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645468.

The product of its digits is 39513600, while the sum is 61.

The square root of 3855778378 is about 62094.9142684004. The cubic root of 3855778378 is about 1568.0889262721.

The spelling of 3855778378 in words is "three billion, eight hundred fifty-five million, seven hundred seventy-eight thousand, three hundred seventy-eight".