3856140 has 96 divisors (see below), whose sum is σ = 12384960. Its totient is φ = 995328.

The previous prime is 3856133. The next prime is 3856141. The reversal of 3856140 is 416583.

It is a super-3 number, since 3×3856140³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3856141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19884 + ... + 20076.

It is an arithmetic number, because the mean of its divisors is an integer number (129010).

Almost surely, 2^3856140 is an apocalyptic number.

3856140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3856140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6192480).

3856140 is an abundant number, since it is smaller than the sum of its proper divisors (8528820).

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

3856140 is a wasteful number, since it uses less digits than its factorization.

3856140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 3856140 is about 1963.7056805947. The cubic root of 3856140 is about 156.8137946874.

The spelling of 3856140 in words is "three million, eight hundred fifty-six thousand, one hundred forty".