3665850 has 24 divisors (see below), whose sum is σ = 9091680. Its totient is φ = 977520.

The previous prime is 3665839. The next prime is 3665869. The reversal of 3665850 is 585663.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12070 + ... + 12369.

It is an arithmetic number, because the mean of its divisors is an integer number (378820).

Almost surely, 2^3665850 is an apocalyptic number.

3665850 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3665850 is an abundant number, since it is smaller than the sum of its proper divisors (5425830).

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

3665850 is a wasteful number, since it uses less digits than its factorization.

3665850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24454 (or 24449 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 3665850 is about 1914.6409585089. The cubic root of 3665850 is about 154.1907177800.

It can be divided in two parts, 366 and 5850, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 3665850 in words is "three million, six hundred sixty-five thousand, eight hundred fifty".