3866850 has 72 divisors (see below), whose sum is σ = 11205012. Its totient is φ = 950400.

The previous prime is 3866839. The next prime is 3866857. The reversal of 3866850 is 586683.

It can be written as a sum of positive squares in 6 ways, for example, as 1252161 + 2614689 = 1119^2 + 1617^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3866857) 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, 5520 + ... + 6180.

Almost surely, 2^3866850 is an apocalyptic number.

3866850 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 3866850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5602506).

3866850 is an abundant number, since it is smaller than the sum of its proper divisors (7338162).

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

3866850 is a wasteful number, since it uses less digits than its factorization.

3866850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3866850 is about 1966.4307768137. The cubic root of 3866850 is about 156.9588381145.

The spelling of 3866850 in words is "three million, eight hundred sixty-six thousand, eight hundred fifty".