3978444790 has 16 divisors (see below), whose sum is σ = 7165536768. Its totient is φ = 1590414336.

The previous prime is 3978444719. The next prime is 3978444817. The reversal of 3978444790 is 974448793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102987 + ... + 136246.

It is an arithmetic number, because the mean of its divisors is an integer number (447846048).

Almost surely, 2^3978444790 is an apocalyptic number.

3978444790 is a deficient number, since it is larger than the sum of its proper divisors (3187091978).

3978444790 is a wasteful number, since it uses less digits than its factorization.

3978444790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240903.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The square root of 3978444790 is about 63074.9141101278. The cubic root of 3978444790 is about 1584.5445177884.

The spelling of 3978444790 in words is "three billion, nine hundred seventy-eight million, four hundred forty-four thousand, seven hundred ninety".