3945818 has 8 divisors (see below), whose sum is σ = 5958900. Its totient is φ = 1959520.

The previous prime is 3945803. The next prime is 3945841. The reversal of 3945818 is 8185493.

It can be written as a sum of positive squares in 2 ways, for example, as 3869089 + 76729 = 1967^2 + 277^2 .

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, 6323 + ... + 6918.

Almost surely, 2^3945818 is an apocalyptic number.

3945818 is a deficient number, since it is larger than the sum of its proper divisors (2013082).

3945818 is a wasteful number, since it uses less digits than its factorization.

3945818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13392.

The product of its digits is 34560, while the sum is 38.

The square root of 3945818 is about 1986.4083165351. The cubic root of 3945818 is about 158.0201063981.

The spelling of 3945818 in words is "three million, nine hundred forty-five thousand, eight hundred eighteen".