3865480 has 32 divisors (see below), whose sum is σ = 8913240. Its totient is φ = 1507840.

The previous prime is 3865469. The next prime is 3865481. The reversal of 3865480 is 845683.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 2439844 = 1194^2 + 1562^2 .

It is not an unprimeable number, because it can be changed into a prime (3865481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462 + ... + 2818.

Almost surely, 2^3865480 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 3865480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4456620).

3865480 is an abundant number, since it is smaller than the sum of its proper divisors (5047760).

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

3865480 is a wasteful number, since it uses less digits than its factorization.

3865480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409 (or 2405 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 3865480 is about 1966.0823990871. The cubic root of 3865480 is about 156.9402994238.

The spelling of 3865480 in words is "three million, eight hundred sixty-five thousand, four hundred eighty".