3850640 has 40 divisors (see below), whose sum is σ = 9047040. Its totient is φ = 1524096.

The previous prime is 3850633. The next prime is 3850657. The reversal of 3850640 is 460583.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9971 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (226176).

Almost surely, 2^3850640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3850640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4523520).

3850640 is an abundant number, since it is smaller than the sum of its proper divisors (5196400).

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

3850640 is a wasteful number, since it uses less digits than its factorization.

3850640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3850640 is about 1962.3047673590. The cubic root of 3850640 is about 156.7392048778.

The spelling of 3850640 in words is "three million, eight hundred fifty thousand, six hundred forty".