3865850 has 12 divisors (see below), whose sum is σ = 7190574. Its totient is φ = 1546320.

The previous prime is 3865847. The next prime is 3865853. The reversal of 3865850 is 585683.

3865850 = 189² + 190² + ... + 263².

It is an interprime number because it is at equal distance from previous prime (3865847) and next prime (3865853).

It can be written as a sum of positive squares in 3 ways, for example, as 3171961 + 693889 = 1781^2 + 833^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3865850.

It is not an unprimeable number, because it can be changed into a prime (3865853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38609 + ... + 38708.

Almost surely, 2^3865850 is an apocalyptic number.

3865850 is a deficient number, since it is larger than the sum of its proper divisors (3324724).

3865850 is a wasteful number, since it uses less digits than its factorization.

3865850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77329 (or 77324 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 3865850 is about 1966.1764925866. The cubic root of 3865850 is about 156.9453066552.

The spelling of 3865850 in words is "three million, eight hundred sixty-five thousand, eight hundred fifty".