3258640 has 120 divisors (see below), whose sum is σ = 9874368. Its totient is φ = 971520.

The previous prime is 3258631. The next prime is 3258649. The reversal of 3258640 is 468523.

It is an interprime number because it is at equal distance from previous prime (3258631) and next prime (3258649).

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 = 3258599 and 3258608.

It is not an unprimeable number, because it can be changed into a prime (3258649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141669 + ... + 141691.

Almost surely, 2^3258640 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 3258640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4937184).

3258640 is an abundant number, since it is smaller than the sum of its proper divisors (6615728).

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

3258640 is a wasteful number, since it uses less digits than its factorization.

3258640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 48 counting only the distinct ones).

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

The square root of 3258640 is about 1805.1703520721. The cubic root of 3258640 is about 148.2559486384.

The spelling of 3258640 in words is "three million, two hundred fifty-eight thousand, six hundred forty".