3978223408 has 20 divisors (see below), whose sum is σ = 7723521288. Its totient is φ = 1985056640.

The previous prime is 3978223339. The next prime is 3978223409. The reversal of 3978223408 is 8043228793.

It is a super-2 number, since 2×3978223408² = 31652522967918268928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3978223409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245341 + ... + 261052.

Almost surely, 2^3978223408 is an apocalyptic number.

It is an amenable number.

3978223408 is a deficient number, since it is larger than the sum of its proper divisors (3745297880).

3978223408 is a wasteful number, since it uses less digits than its factorization.

3978223408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506892 (or 506886 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 3978223408 is about 63073.1591725038. The cubic root of 3978223408 is about 1584.5151263922.

It can be divided in two parts, 39782 and 23408, that added together give a triangular number (63190 = T₃₅₅).

The spelling of 3978223408 in words is "three billion, nine hundred seventy-eight million, two hundred twenty-three thousand, four hundred eight".