3978078 has 16 divisors (see below), whose sum is σ = 8568336. Its totient is φ = 1224000.

The previous prime is 3978071. The next prime is 3978101. The reversal of 3978078 is 8708793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25423 + ... + 25578.

It is an arithmetic number, because the mean of its divisors is an integer number (535521).

Almost surely, 2^3978078 is an apocalyptic number.

3978078 is an abundant number, since it is smaller than the sum of its proper divisors (4590258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978078 is a wasteful number, since it uses less digits than its factorization.

3978078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51019.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 3978078 is about 1994.5119703827. The cubic root of 3978078 is about 158.4495820959.

The spelling of 3978078 in words is "three million, nine hundred seventy-eight thousand, seventy-eight".