3978996 has 72 divisors (see below), whose sum is σ = 11069856. Its totient is φ = 1108800.

The previous prime is 3978979. The next prime is 3979013. The reversal of 3978996 is 6998793.

It is an interprime number because it is at equal distance from previous prime (3978979) and next prime (3979013).

Its product of digits (734832) is a multiple of the sum of its prime factors (189).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39346 + ... + 39446.

It is an arithmetic number, because the mean of its divisors is an integer number (153748).

Almost surely, 2^3978996 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 3978996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5534928).

3978996 is an abundant number, since it is smaller than the sum of its proper divisors (7090860).

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

3978996 is a wasteful number, since it uses less digits than its factorization.

3978996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 180 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 3978996 is about 1994.7420885919. The cubic root of 3978996 is about 158.4617693489.

The spelling of 3978996 in words is "three million, nine hundred seventy-eight thousand, nine hundred ninety-six".