3840280 has 64 divisors (see below), whose sum is σ = 9446400. Its totient is φ = 1399680.

The previous prime is 3840271. The next prime is 3840289. The reversal of 3840280 is 820483.

It is an interprime number because it is at equal distance from previous prime (3840271) and next prime (3840289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840289) 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, 23479 + ... + 23641.

It is an arithmetic number, because the mean of its divisors is an integer number (147600).

Almost surely, 2^3840280 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 3840280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4723200).

3840280 is an abundant number, since it is smaller than the sum of its proper divisors (5606120).

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

3840280 is a wasteful number, since it uses less digits than its factorization.

3840280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 3840280 is about 1959.6632363751. The cubic root of 3840280 is about 156.5985116756.

The spelling of 3840280 in words is "three million, eight hundred forty thousand, two hundred eighty".