3658240 has 40 divisors (see below), whose sum is σ = 8777340. Its totient is φ = 1462272.

The previous prime is 3658211. The next prime is 3658283. The reversal of 3658240 is 428563.

It can be written as a sum of positive squares in 2 ways, for example, as 3268864 + 389376 = 1808^2 + 624^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 3658199 and 3658208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846 + ... + 3274.

Almost surely, 2^3658240 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 3658240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4388670).

3658240 is an abundant number, since it is smaller than the sum of its proper divisors (5119100).

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

3658240 is an equidigital number, since it uses as much as digits as its factorization.

3658240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3658240 is about 1912.6526082904. The cubic root of 3658240 is about 154.0839481582.

The spelling of 3658240 in words is "three million, six hundred fifty-eight thousand, two hundred forty".