3978312 has 64 divisors (see below), whose sum is σ = 11007360. Its totient is φ = 1190400.

The previous prime is 3978301. The next prime is 3978329. The reversal of 3978312 is 2138793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12637 + ... + 12947.

It is an arithmetic number, because the mean of its divisors is an integer number (171990).

Almost surely, 2^3978312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3978312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5503680).

3978312 is an abundant number, since it is smaller than the sum of its proper divisors (7029048).

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

3978312 is a wasteful number, since it uses less digits than its factorization.

3978312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 370 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 3978312 is about 1994.5706304867. The cubic root of 3978312 is about 158.4526888286.

The spelling of 3978312 in words is "three million, nine hundred seventy-eight thousand, three hundred twelve".