3978218232 has 64 divisors (see below), whose sum is σ = 11074752000. Its totient is φ = 1323175392.

The previous prime is 3978218203. The next prime is 3978218239. The reversal of 3978218232 is 2328128793.

3978218232 is a `hidden beast` number, since 397 + 8 + 21 + 8 + 232 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978218239) 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 15 ways as a sum of consecutive naturals, for example, 80119 + ... + 119897.

It is an arithmetic number, because the mean of its divisors is an integer number (173043000).

Almost surely, 2^3978218232 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 3978218232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5537376000).

3978218232 is an abundant number, since it is smaller than the sum of its proper divisors (7096533768).

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

3978218232 is a wasteful number, since it uses less digits than its factorization.

3978218232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40257 (or 40247 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3978218232 is about 63073.1181407737. The cubic root of 3978218232 is about 1584.5144391965.

The spelling of 3978218232 in words is "three billion, nine hundred seventy-eight million, two hundred eighteen thousand, two hundred thirty-two".