3861997700 has 72 divisors (see below), whose sum is σ = 9355130400. Its totient is φ = 1371686400.

The previous prime is 3861997697. The next prime is 3861997709. The reversal of 3861997700 is 77991683.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (3861997709) 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 23 ways as a sum of consecutive naturals, for example, 6476 + ... + 88124.

Almost surely, 2^3861997700 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 3861997700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4677565200).

3861997700 is an abundant number, since it is smaller than the sum of its proper divisors (5493132700).

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

3861997700 is a wasteful number, since it uses less digits than its factorization.

3861997700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81717 (or 81710 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 3861997700 is about 62144.9732480432. The cubic root of 3861997700 is about 1568.9315759413.

The spelling of 3861997700 in words is "three billion, eight hundred sixty-one million, nine hundred ninety-seven thousand, seven hundred".