3978994 has 8 divisors (see below), whose sum is σ = 6014448. Its totient is φ = 1974180.

The previous prime is 3978979. The next prime is 3979013. The reversal of 3978994 is 4998793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7332 + ... + 7855.

It is an arithmetic number, because the mean of its divisors is an integer number (751806).

Almost surely, 2^3978994 is an apocalyptic number.

3978994 is a deficient number, since it is larger than the sum of its proper divisors (2035454).

3978994 is a wasteful number, since it uses less digits than its factorization.

3978994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15320.

The product of its digits is 489888, while the sum is 49.

The square root of 3978994 is about 1994.7415872739. The cubic root of 3978994 is about 158.4617427991.

The spelling of 3978994 in words is "three million, nine hundred seventy-eight thousand, nine hundred ninety-four".