3861278200 has 144 divisors (see below), whose sum is σ = 9864212400. Its totient is φ = 1404748800.

The previous prime is 3861278147. The next prime is 3861278207. The reversal of 3861278200 is 28721683.

It is a self number, because there is not a number n which added to its sum of digits gives 3861278200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861278207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2398996 + ... + 2400604.

It is an arithmetic number, because the mean of its divisors is an integer number (68501475).

Almost surely, 2^3861278200 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 3861278200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4932106200).

3861278200 is an abundant number, since it is smaller than the sum of its proper divisors (6002934200).

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

3861278200 is a wasteful number, since it uses less digits than its factorization.

3861278200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 3861278200 is about 62139.1840950619. The cubic root of 3861278200 is about 1568.8341379083.

Adding to 3861278200 its reverse (28721683), we get a palindrome (3889999883).

The spelling of 3861278200 in words is "three billion, eight hundred sixty-one million, two hundred seventy-eight thousand, two hundred".