3945178 has 4 divisors (see below), whose sum is σ = 5917770. Its totient is φ = 1972588.

The previous prime is 3945163. The next prime is 3945203. The reversal of 3945178 is 8715493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8715493 = 41 ⋅212573.

It can be written as a sum of positive squares in only one way, i.e., 3853369 + 91809 = 1963^2 + 303^2 .

It is a super-3 number, since 3×3945178³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986293 + ... + 986296.

Almost surely, 2^3945178 is an apocalyptic number.

3945178 is a deficient number, since it is larger than the sum of its proper divisors (1972592).

3945178 is a wasteful number, since it uses less digits than its factorization.

3945178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972591.

The product of its digits is 30240, while the sum is 37.

The square root of 3945178 is about 1986.2472152278. The cubic root of 3945178 is about 158.0115624717.

The spelling of 3945178 in words is "three million, nine hundred forty-five thousand, one hundred seventy-eight".