3985650 has 72 divisors (see below), whose sum is σ = 11359764. Its totient is φ = 998400.

The previous prime is 3985637. The next prime is 3985661. The reversal of 3985650 is 565893.

3985650 is a `hidden beast` number, since 3 + 98 + 565 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1580049 + 2405601 = 1257^2 + 1551^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7390 + ... + 7910.

Almost surely, 2^3985650 is an apocalyptic number.

3985650 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 3985650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5679882).

3985650 is an abundant number, since it is smaller than the sum of its proper divisors (7374114).

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

3985650 is a wasteful number, since it uses less digits than its factorization.

3985650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 548 counting only the distinct ones).

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

The square root of 3985650 is about 1996.4092766765. The cubic root of 3985650 is about 158.5500510331.

The spelling of 3985650 in words is "three million, nine hundred eighty-five thousand, six hundred fifty".