3850840 has 64 divisors (see below), whose sum is σ = 10497600. Its totient is φ = 1241088.

The previous prime is 3850837. The next prime is 3850841. The reversal of 3850840 is 480583.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3850799 and 3850808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3850841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4356 + ... + 5164.

It is an arithmetic number, because the mean of its divisors is an integer number (164025).

Almost surely, 2^3850840 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 3850840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5248800).

3850840 is an abundant number, since it is smaller than the sum of its proper divisors (6646760).

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

3850840 is a wasteful number, since it uses less digits than its factorization.

3850840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 3850840 is about 1962.3557271810. The cubic root of 3850840 is about 156.7419184785.

The spelling of 3850840 in words is "three million, eight hundred fifty thousand, eight hundred forty".