3256261440 has 56 divisors (see below), whose sum is σ = 10338633120. Its totient is φ = 868336128.

The previous prime is 3256261429. The next prime is 3256261441. The reversal of 3256261440 is 441626523.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3256261441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695010 + ... + 1696929.

Almost surely, 2^3256261440 is an apocalyptic number.

3256261440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3256261440 is an abundant number, since it is smaller than the sum of its proper divisors (7082371680).

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

3256261440 is a wasteful number, since it uses less digits than its factorization.

3256261440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391959 (or 3391949 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 3256261440 is about 57063.6612915785. The cubic root of 3256261440 is about 1482.1986799294.

Adding to 3256261440 its reverse (441626523), we get a palindrome (3697887963).

The spelling of 3256261440 in words is "three billion, two hundred fifty-six million, two hundred sixty-one thousand, four hundred forty".