3878197440 has 448 divisors, whose sum is σ = 14132966400. Its totient is φ = 893730816.

The previous prime is 3878197409. The next prime is 3878197441. The reversal of 3878197440 is 447918783.

It is not an unprimeable number, because it can be changed into a prime (3878197441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16935246 + ... + 16935474.

It is an arithmetic number, because the mean of its divisors is an integer number (31546800).

Almost surely, 2^3878197440 is an apocalyptic number.

3878197440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7066483200).

3878197440 is an abundant number, since it is smaller than the sum of its proper divisors (10254768960).

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

3878197440 is a wasteful number, since it uses less digits than its factorization.

3878197440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 3878197440 is about 62275.1751502956. The cubic root of 3878197440 is about 1571.1222236033.

The spelling of 3878197440 in words is "three billion, eight hundred seventy-eight million, one hundred ninety-seven thousand, four hundred forty".