1340240256 has 224 divisors, whose sum is σ = 4093765920. Its totient is φ = 436700160.

The previous prime is 1340240227. The next prime is 1340240257. The reversal of 1340240256 is 6520420431.

1340240256 is a `hidden beast` number, since 1 + 3 + 402 + 4 + 0 + 256 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340240257) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4945401 + ... + 4945671.

Almost surely, 2^1340240256 is an apocalyptic number.

1340240256 is a gapful number since it is divisible by the number (16) 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 1340240256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046882960).

1340240256 is an abundant number, since it is smaller than the sum of its proper divisors (2753525664).

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

1340240256 is an frugal number, since it uses more digits than its factorization.

1340240256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1340240256 is about 36609.2919352451. The cubic root of 1340240256 is about 1102.5396570491.

Adding to 1340240256 its reverse (6520420431), we get a palindrome (7860660687).

The spelling of 1340240256 in words is "one billion, three hundred forty million, two hundred forty thousand, two hundred fifty-six".