3865950 has 108 divisors (see below), whose sum is σ = 11577384. Its totient is φ = 924000.

The previous prime is 3865943. The next prime is 3865951. The reversal of 3865950 is 595683.

It is a super-3 number, since 3×3865950³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865951) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 54415 + ... + 54485.

It is an arithmetic number, because the mean of its divisors is an integer number (107198).

Almost surely, 2^3865950 is an apocalyptic number.

3865950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5788692).

3865950 is an abundant number, since it is smaller than the sum of its proper divisors (7711434).

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

3865950 is a wasteful number, since it uses less digits than its factorization.

3865950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 3865950 is about 1966.2019224891. The cubic root of 3865950 is about 156.9466599061.

It can be divided in two parts, 386 and 5950, that added together give a palindrome (6336).

The spelling of 3865950 in words is "three million, eight hundred sixty-five thousand, nine hundred fifty".