1256330464 has 96 divisors (see below), whose sum is σ = 2775215520. Its totient is φ = 556351488.

The previous prime is 1256330429. The next prime is 1256330477. The reversal of 1256330464 is 4640336521.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2035884 + ... + 2036500.

It is an arithmetic number, because the mean of its divisors is an integer number (28908495).

Almost surely, 2^1256330464 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 1256330464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387607760).

1256330464 is an abundant number, since it is smaller than the sum of its proper divisors (1518885056).

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

1256330464 is a wasteful number, since it uses less digits than its factorization.

1256330464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 1256330464 is about 35444.7522773118. The cubic root of 1256330464 is about 1079.0327599772.

Adding to 1256330464 its reverse (4640336521), we get a palindrome (5896666985).

The spelling of 1256330464 in words is "one billion, two hundred fifty-six million, three hundred thirty thousand, four hundred sixty-four".