1244241920 has 112 divisors (see below), whose sum is σ = 3070436328. Its totient is φ = 483655680.

The previous prime is 1244241913. The next prime is 1244241941. The reversal of 1244241920 is 291424421.

It can be written as a sum of positive squares in 4 ways, for example, as 1094815744 + 149426176 = 33088^2 + 12224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515110 + ... + 1515930.

Almost surely, 2^1244241920 is an apocalyptic number.

1244241920 is a gapful number since it is divisible by the number (10) 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 1244241920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535218164).

1244241920 is an abundant number, since it is smaller than the sum of its proper divisors (1826194408).

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

1244241920 is an frugal number, since it uses more digits than its factorization.

1244241920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1244241920 is about 35273.8135165451. The cubic root of 1244241920 is about 1075.5607444090.

The spelling of 1244241920 in words is "one billion, two hundred forty-four million, two hundred forty-one thousand, nine hundred twenty".