3865031000 has 128 divisors (see below), whose sum is σ = 9297288000. Its totient is φ = 1503360000.

The previous prime is 3865030991. The next prime is 3865031003. The reversal of 3865031000 is 1305683.

It is a super-2 number, since 2×3865031000² = 29876929261922000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865031003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6430700 + ... + 6431300.

Almost surely, 2^3865031000 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 3865031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4648644000).

3865031000 is an abundant number, since it is smaller than the sum of its proper divisors (5432257000).

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

3865031000 is a wasteful number, since it uses less digits than its factorization.

3865031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3865031000 is about 62169.3734888812. The cubic root of 3865031000 is about 1569.3422265174.

Adding to 3865031000 its reverse (1305683), we get a palindrome (3866336683).

The spelling of 3865031000 in words is "three billion, eight hundred sixty-five million, thirty-one thousand".