1244470656 has 256 divisors, whose sum is σ = 3935796480. Its totient is φ = 343449600.

The previous prime is 1244470651. The next prime is 1244470673. The reversal of 1244470656 is 6560744421.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244470651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7193386 + ... + 7193558.

It is an arithmetic number, because the mean of its divisors is an integer number (15374205).

Almost surely, 2^1244470656 is an apocalyptic number.

1244470656 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 1244470656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1967898240).

1244470656 is an abundant number, since it is smaller than the sum of its proper divisors (2691325824).

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

1244470656 is a wasteful number, since it uses less digits than its factorization.

1244470656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 1244470656 is about 35277.0556594509. The cubic root of 1244470656 is about 1075.6266491671.

The spelling of 1244470656 in words is "one billion, two hundred forty-four million, four hundred seventy thousand, six hundred fifty-six".