3851978 has 8 divisors (see below), whose sum is σ = 6222468. Its totient is φ = 1777824.

The previous prime is 3851977. The next prime is 3851989. The reversal of 3851978 is 8791583.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 76729 = 1943^2 + 277^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3851977) 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, 74051 + ... + 74102.

Almost surely, 2^3851978 is an apocalyptic number.

3851978 is a deficient number, since it is larger than the sum of its proper divisors (2370490).

3851978 is a wasteful number, since it uses less digits than its factorization.

3851978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148168.

The product of its digits is 60480, while the sum is 41.

The square root of 3851978 is about 1962.6456633840. The cubic root of 3851978 is about 156.7573570785.

The spelling of 3851978 in words is "three million, eight hundred fifty-one thousand, nine hundred seventy-eight".