3978118 has 4 divisors (see below), whose sum is σ = 5967180. Its totient is φ = 1989058.

The previous prime is 3978113. The next prime is 3978167. The reversal of 3978118 is 8118793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8118793 = 23 ⋅352991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994528 + ... + 994531.

It is an arithmetic number, because the mean of its divisors is an integer number (1491795).

Almost surely, 2^3978118 is an apocalyptic number.

3978118 is a deficient number, since it is larger than the sum of its proper divisors (1989062).

3978118 is a wasteful number, since it uses less digits than its factorization.

3978118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989061.

The product of its digits is 12096, while the sum is 37.

The square root of 3978118 is about 1994.5219978732. The cubic root of 3978118 is about 158.4501131699.

It can be divided in two parts, 3978 and 118, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3978118 in words is "three million, nine hundred seventy-eight thousand, one hundred eighteen".