1240700256 has 144 divisors (see below), whose sum is σ = 3756615408. Its totient is φ = 387072000.

The previous prime is 1240700231. The next prime is 1240700257. The reversal of 1240700256 is 6520070421.

1240700256 is a `hidden beast` number, since 1 + 2 + 407 + 0 + 0 + 256 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240700257) 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, 1032456 + ... + 1033656.

It is an arithmetic number, because the mean of its divisors is an integer number (26087607).

Almost surely, 2^1240700256 is an apocalyptic number.

1240700256 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 1240700256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878307704).

1240700256 is an abundant number, since it is smaller than the sum of its proper divisors (2515915152).

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

1240700256 is a wasteful number, since it uses less digits than its factorization.

1240700256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1240700256 is about 35223.5752870148. The cubic root of 1240700256 is about 1074.5392670666.

Adding to 1240700256 its reverse (6520070421), we get a palindrome (7760770677).

The spelling of 1240700256 in words is "one billion, two hundred forty million, seven hundred thousand, two hundred fifty-six".