3861997750 has 32 divisors (see below), whose sum is σ = 7785794016. Its totient is φ = 1425967200.

The previous prime is 3861997739. The next prime is 3861997757. The reversal of 3861997750 is 577991683.

3861997750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3861997691 and 3861997700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861997757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590904 + ... + 597403.

It is an arithmetic number, because the mean of its divisors is an integer number (243306063).

Almost surely, 2^3861997750 is an apocalyptic number.

3861997750 is an abundant number, since it is smaller than the sum of its proper divisors (3923796266).

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

3861997750 is a wasteful number, since it uses less digits than its factorization.

3861997750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188337 (or 1188327 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 55.

The square root of 3861997750 is about 62144.9736503283. The cubic root of 3861997750 is about 1568.9315827122.

The spelling of 3861997750 in words is "three billion, eight hundred sixty-one million, nine hundred ninety-seven thousand, seven hundred fifty".