3256440 has 64 divisors (see below), whose sum is σ = 10661760. Its totient is φ = 789120.

The previous prime is 3256427. The next prime is 3256441. The reversal of 3256440 is 446523.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3256440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3256441) 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, 87 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (166590).

Almost surely, 2^3256440 is an apocalyptic number.

3256440 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 3256440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5330880).

3256440 is an abundant number, since it is smaller than the sum of its proper divisors (7405320).

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

3256440 is a wasteful number, since it uses less digits than its factorization.

3256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 3256440 is about 1804.5608884158. The cubic root of 3256440 is about 148.2225771996. Note that the first 3 decimals are identical.

The spelling of 3256440 in words is "three million, two hundred fifty-six thousand, four hundred forty".